US President Donald Trump warned Russia he is prepared to impose strong economic measures over the war in Ukraine and rejected a global move toward recognition of a Palestinian state, in a combative speech to the UN General Assembly. In his first UN address since regaining power in January, Trump spoke to dozens of world leaders, many of whom have been alarmed to see the United States turn away from traditional alliances in favor of an isolationist "America First" policy. Trump's warning to Russia came with a twist. He said he wants US allies to impose the same measures on Russia he is proposing to try to force Russian President Vladimir Putin to pull back from the biggest war in...