Trump on Monday said the United States would ship "billions of dollars' worth" of military equipment to NATO members, paid for by the alliance, to be handed over to Ukrainian forces battling grinding Russian advances. Trump had earlier this month suggested NATO would "100 percent" pay for U.S. weapons, which would be sent to Ukraine.

Trump said the United States would put secondary tariffs on countries that do business with Russia if a peace deal is not reached in 50 days.

Though endlessly critical of his predecessor, President Trump has adopted a Ukraine strategy similar to that of former President Joe Biden: Arm the Ukrainians to the teeth and threaten Russian President Vladimir Putin with even more sanctions if he does not agree to a peace deal.