“Putin will not negotiate as a loser,” one of his longtime associates tells TIME by phone from Moscow. “He knows that winners don’t get punished, and if he wins, all of this” — the sanctions, the tariffs — “will go away.”

Donald Trump has said that he is disappointed but not done with Vladimir Putin, in an exclusive phone call with the BBC. When the US president was pressed on whether he trusts the Russian leader by Chief North America Correspondent Gary O'Donoghue,

U.S. President Donald Trump said he was "not done" with Russian President Vladimir Putin, according to a BBC interview published on Tuesday, hours after he said he was disappointed in Putin and threatened Moscow with sanctions.

In response to the escalating threat, President Trump confirmed that the U.S. will send additional Patriot air defense missiles to Ukraine. He noted that the European Union would finance the purchase of what he described as "various pieces of very sophisticated" U.S. weaponry.

The president left the door open for talks with his Russian counterpart but complained about Russia’s continued aerial attacks on Ukraine.

President Donald Trump said Monday he would punish Russia with “biting” tariffs if there isn’t a deal to end the war in Ukraine within 50 days. He made the announcement during an Oval Office meeting with NATO Secretary-General Mark Rutte.