On Monday, Trump said that Russia's failure to reach a negotiated settlement with Ukraine within 50 days would lead to his administration imposing a 100% tariff rate on Russian imports as well as what he called "secondary tariffs" on countries that have continued to do business with Moscow.

U.S. President Donald Trump has privately encouraged Ukraine to step up strikes deep in Russian territory, even asking Ukrainian President Volodymyr Zelenskiy whether he could hit Moscow if the U.S. provided long-range weapons,