Donald Trump says he would end Russia’s war in Ukraine should he return to the White House – but any rushed deal will likely leave Kyiv much weaker and European security in even greater peril.
Another major flashpoint a Trump presidency would immediately seek to influence is the escalating conflict between Iran and Israel.
Mr Trump came close to direct war with Tehran during his first term in office and prior restraint could well give way to direct confrontation this time around.
Then there is the overwhelming longer-term challenge posed by China, with North Korea another growing headache especially after Mr Trump tried but failed to woo the leader of the hermit state during his first stint as commander-in-chief.
Image: Mr Trump meets North Korean leader Kim Jong Un in 2019. Pic: AP
With the US election on a knife edge, hostile and friendly capitals around the world have been gaming what a second Trump White House might mean for their respective national interests and for the most pressing global security threats.
Mr Trump’s track record of unpredictability is a challenge for traditional foes – but also for Washington’s closest allies, in particular fellow members of the NATO alliance.
The Republican nominee has made no secret of his frustration at how the US has for decades bankrolled the security blanket that protects Europe.
During his first term as president, Mr Trump threatened to withdraw the US from the alliance – a move that would almost certainly sound its death knell. His rhetoric did help to spur allies to dig deeper into their pockets and spend more on their militaries, though.
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But the damage of years of underinvestment is deep and the pace of recovery is too slow for European NATO allies and Canada to credibly stand on their own as a potent military force any time soon.
Image: Meeting Volodymyr Zelenskyy in New York in September – but what would a Trump presidency mean for Ukraine’s war with Russia? Pic: Reuters
In terms of immediacy when it comes to global crises, the impact of a Trump victory would be felt most acutely by Ukraine and also by Iran.
The presidential candidate has repeatedly claimed that he would quickly end the Ukraine war, though without explaining how or what peace would look like.
In an indication of where his priorities lie, however, he has accused Ukrainian President Volodymyr Zelenskyy of being the “greatest salesman on earth” for securing tens of billions of dollars in weapons and other assistance that Washington has given to Kyiv.
Image: Pic: Reuters
Yet – coupled with Ukraine’s willingness to fight – that military aid is the biggest reason why Ukraine has managed to withstand almost 1,000 days of Vladimir Putin’swar.
Stop the flow of American weapons, and Ukrainian troops – despite their own ingenuity and the support of other allies – will simply lack the firepower to keep resisting the onslaught.
Image: Kamala Harris believes US support for Mr Zelenskyy and Ukraine is vital. Pic: Reuters
By contrast, US vice president Kamala Harris, who is vying for the top job, has made clear that she views continued support to Ukraine as being as vital to US and Western interests as it is to Kyiv’s – a far more familiar stance that echoes the view of her NATO partners.
While US support for Ukraine would undoubtedly change under a Trump administration, that is not the same as facilitating a complete surrender.
The former president – who portrays himself as the ultimate dealmaker and has adopted a new election slogan – “Trump will fix it” – will not want to be held responsible for the total absorption of Ukraine into Mr Putin’s orbit.
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How does the US election work?
Putin and Iran
His relationship with the Russian president is a particularly interesting dynamic.
But with the right advice, might a future President Trump be able to use his connection with Mr Putin to the West’s advantage?
At the very least, it adds a new level of unpredictability – which is perhaps the most important element when it comes to assessing the potential impact on the world of a second Trump term.
Image: Donald Trump said in 2020 ‘as long as I’m president of the United States, Iran will never be allowed to have a nuclear weapon’. Pic: Reuters
On Iran, in stark contrast to his approach to Russia’s war in Ukraine, a future President Trump may well back much greater US military support for Israel’s conflict against Tehran and its proxies – perhaps even direct involvement by US forces in strikes on Iran.
Mr Trump has an even tougher stance towards Tehran and its nuclear ambitions than Joe Biden’s administration.
His decision to rip up a major nuclear deal with Iran was one of his most significant foreign policy acts during his four years as president.
It is also personal, with Iran accused of hacking the Trump campaign in recent months – an attack that would surely only heighten tensions with Iran during any second Trump term.
On election night, Sky News will have access to the most comprehensive exit poll and vote-counting results from every state, county and demographic across America through its US-partner network NBC.
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Palestinian President Mahmoud Abbas and 80 other officials have been blocked from attending September’s annual meeting of the United Nations General Assembly in New York.
US secretary of state Marco Rubio has revoked the US visas of delegates from the Palestinian Authority (PA) and Palestine Liberation Organisation (PLO), and denied others from applying for one.
It is the latest step by Donald Trump’s administration to target Palestinians with visa restrictions, and follows the suspension of a programme to allow injured children from Gaza to receive treatment in the US.
Image: Mahmoud Abbas addressed the general assembly in 2024, but is barred from next month’s meeting. Pic: Reuters
“It is in our national security interests to hold the PLO and PA accountable for not complying with their commitments, and for undermining the prospects for peace,” a statement from the US State Department said.
It added that, to be considered partners for peace, both groups “must consistently repudiate terrorism, and end incitement to terrorism in education, as required by US law and as promised by the PLO”.
Israel declared Gaza’s largest city a dangerous combat zone on Friday.
The army launched a planned offensive that has drawn international condemnation.
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Thick smoke rises from Gaza City after Israeli strikes
Foreign ministers from Iceland, Ireland, Luxembourg, Norway, Slovenia and Spain released a joint statement saying the military operations in Gaza City will cause “intolerable deaths of innocent Palestinian civilians”.
Hundreds of thousands of Palestinians are sheltering in Gaza City while enduring famine.
Image: An Israeli armoured vehicle in northern Gaza on Friday. Pic: AP
Image: Palestinians ride a truck carrying humanitarian aid in Gaza City. Pic: AP
The Palestinian ambassador to the United Nations (UN), Riyad Mansour, said Mr Abbas had planned to lead the delegation to the UN meetings and was expected to address the general assembly at the general debate, which begins on 23 September.
He was also expected to attend a high-level meeting co-chaired by France and Saudi Arabia on 22 September about a two-state solution, a broad idea involving Israel coexisting with an independent Palestinian state.
The State of Palestine is an observer member of the UN, meaning it can speak at meetings but not vote on resolutions.
Image: The State of Palestine cannot vote on UN resolutions. Pic: AP
US decision ‘contravenes international law’
The Palestinian Authority “expressed its deep regret and astonishment” at the visa decision, calling it “a violation of US commitments” as the host of the UN, and claiming it “contravenes international law”.
UN spokesman Stephane Dujarric said the world body would be seeking clarification in the “hope that this will be resolved”.
Image: Hundreds of diplomats left when Israeli leader Benjamin Netanyahu began speaking at the general assembly in 2024. Pic: Reuters
The State Department said that the Palestinian Authority’s mission to the UN, comprising officials who are permanently based there, would not be included in the restrictions.
Under a 1947 UN agreement, the US is generally required to allow access for foreign diplomats to the UN in New York.
But Washington has said it can deny visas for security, extremism and foreign policy reasons.
The death toll in Gaza has now risen to 63,025, according to the Hamas-run health ministry, which does not differentiate between civilians and combatants.
It also reported five more malnutrition-related deaths in the last 24 hours, bringing the total number during the war to 322, with 121 of them children.
The Brazilian hosts of the biggest climate meeting of the year have implored businesses to attend in November, amid concerns some are backing away from the climate agenda into the shadow of Donald Trump.
In an interview with Sky News, Ana Toni, chief executive of the COP30 climate summit in November, admitted some companies were having “second thoughts” about the global switch to green economies because policymakers were creating uncertainty.
The US President Donald Trump has been attacking wind farms and waging tariff wars that could slow the transition to green energy.
Banks including HSBC and Barclays have ditched a net zero alliance set up just four years ago by Mark Carney, now the Canadian Prime Minister.
Image: Ana Toni, Brazil’s climate secretary, is chief executive of the COP30 climate talks. Pic: Reuters
But even before Trump took office, tech companies were quietly dropping climate targets to prioritise energy-hungry AI, and other businesses were “greenhushing” their climate initiatives for fear of backlash.
In this environment, there are fears fewer business leaders will attend the annual talks, which are also being hosted in a city on the edge of the Amazon that hasn’t enough hotel rooms.
On Friday, the COP30 team wrote to business leaders urging them to “step forward, not back” and travel to Belem, despite “logistical challenges” and the “background of systemic uncertainty”.
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Ana Toni told Sky News: “We are very concerned that the enabling conditions must be there so that the private sector can also deliver where they do best, which is bringing in technology, bringing innovation and accelerating the process of decarbonisation.”
In August the share price of Danish wind farm developer plummeted after the US halted its Rhode Island wind farm, while the British Tories and Reform parties are also attacking net zero.
Image: Ana Toni met with King Charles and leaders of other COP summits at Clarence House last year. Pic: Reuters
But Ms Toni there is “nothing to panic [about], because we can see that the transition is inevitable,”citing major progress in China, India and Europe and Brazil.
Referring to the US’s withdrawal from the COP process, she said: “198 countries minus one is not zero. And we will put all our efforts of working with the 197 countries that want to go forward and want to protect their population.”
“Climate action is not only [still] cool, it is necessary,” Ms Toni said.
“We all need to face reality. We are going through a huge climate crisis… If you’re not part of the solution, you’re part of the problem. Companies understand that.”
US President Donald Trump has revoked Secret Service protection for former vice president and 2024 Democratic rival Kamala Harris.
A senior adviser to Ms Harris, Kirsten Allen, confirmed the decision. “The vice president is grateful to the United States Secret Service for their professionalism, dedication, and unwavering commitment to safety,” said the adviser.
Typically, vice presidents receive a six-month security detail from the Secret Service after they leave office, although it had been extended to 18 months for Ms Harris, according to officials.
Initially, then-president Joe Biden extended her security arrangements to one year, or January 2026, according to reports.
However, a Secret Service official told Sky News’ US partner, NBC, that Mr Biden subsequently signed an executive memorandum in January increasing the then vice-president’s protection period even further, to 18 months.
Former US presidents receive Secret Service protection for life.
Revoking Harris’ federal protection will be deemed ‘malicious’ by Trump’s critics
We don’t know why the former vice president’s Secret Service protection has been revoked – the White House gave no explanation.
We do know why former president Joe Biden extended it from the usual six months to 18 months before he left office.
Such decisions tend to be based on advice from the Department of Homeland Security, determined by the perceived threat level.
Kamala Harris isn’t just a former vice president of the United States. She was the first woman and first African American to hold that office.
In addition to that, she was the Democratic candidate in last year’s election – the battle against Donald Trump raising her profile even higher.
By early 2025, she had plans for a book tour. Her memoir, 107 Days, marking the short period of her candidature, is due out next month.
Extending federal protection would have bolstered Ms Harris’ safety during extensive public appearances.
In short, the extension reflected heightened security needs – her symbolic status and increased visibility from upcoming public engagements.
But the White House has pulled her Secret Service security detail, a move that will be deemed malicious by the president’s critics.
Ms Harris, who lost the 2024 presidential election to Mr Trump, is due to start a book tour for her memoir, 107 Days, shortly.
She was the Democratic nominee for 107 days after Mr Biden exited the race in the weeks following a challenging debate against Mr Trump.
Mr Trump has also ended federal security protection for others, including former national security adviser John Bolton. Last week, FBI agents raided Mr Bolton’s Maryland home.
In March, the president ended protection for Mr Biden’s children, Hunter and Ashley Biden.
Ms Harris has not ruled out a possible presidential run in 2028. She announced in July that she would not run for governor of California in 2026.