Trump ended his nine-day trip with a speech to US troops in Sicily, where he recounted his visits to Saudi Arabia, Israel, Belgium and Italy and his work to counter terrorism. The president said recent terrorist attacks in Manchester, England and Egypt underscored the need for the US to "defeat terrorism and protect civilisation."
"Terrorism is a threat, bad threat to all of humanity," Trump said, standing in front of a massive American flag at Naval Air Station Sigonella. "And together we will overcome this threat. We will win."
European leaders he met with at the Group of 7 summit in Sicily have been pressuring Trump to stay in the accord, arguing that America's leadership on climate is crucial.
Besides reaching a decision on the climate agreement once back in Washington, Trump will also face a new crush of Russia-related controversies. On Friday, the Washington Post reported that Trump's son-in-law and senior adviser Jared Kushner spoke with Russia's ambassador to the US about setting up secret communications with Moscow.
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The White House had hoped to use Trump's five-stop trip as a moment to reset. The president was warmly received on his opening stops in Saudi Arabia and Israel, though he has come under more pressure in Europe, particularly over the Paris accord.
Trump was cajoled for three days first in Brussels at meetings of NATO and the European Union, then in Sicily for G-7 but will leave Italy without making clear where he stands.
Backing out of the climate accord had been a central plank of Trump's campaign and aides have been exploring whether they can adjust the framework of the deal even if they don't opt out entirely. Other G-7 nations leaned heavily on Trump to stay in the climate deal, with German Chancellor Angela Merkel saying "we put forward very many arguments.