Canada is imposing 25% tariffs on C$30 billion worth of U.S. imports with immediate effect, Prime Minister Justin Trudeau told reporters on Tuesday. He told President Donald Trump that his new tariffs were "a very dumb thing to do". China also retaliated against the U.S. tariffs with hikes to import levies covering $21 billion worth of American agricultural and food products.

Ukrainian President Volodymyr Zelenskiy said he regretted last week's Oval Office clash with Trump and wanted to "make things right", in a statement issued a day after Trump halted military aid to Kyiv.

A House subcommittee heard testimony on the persistent shortage of air traffic controllers and the significant technology and infrastructure woes faced by the Federal Aviation Administration.