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.

Russian President Vladimir Putin has sacrificed an estimated 1 million of his soldiers, killed and wounded, in a three-year campaign to crush Ukraine.

The Kremlin said U.S. President Donald Trump signaled to Ukraine that it should continue the war after he said he would send more weapons to Kyiv and threatened Russia with secondary sanctions unless it makes peace.