The US president spoke to reporters on the White House South Lawn on Tuesday afternoon, the day after he threatened to impose "secondary tariffs" on Moscow

But his frustration with Putin has grown. Last week, the president said the United States was taking “a lot of bullshit” from Putin. Today, he authorized a significant shipment of U.S. defensive weapons to Ukraine via NATO and threatened Russia with new tariffs if the war does not end in 50 days.

“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.”

ABC News’ Linsey Davis is joined by former minister of foreign affairs in Russia Andrei Kozyrev to discuss President Trump’s tariff threats against Russia and how Vladimir Putin may react.

Melania Trump has highlighted Russia's continued attacks on Ukraine in private conversations, President Trump said on Monday.

Donald Trump has once again expressed his disappointment with Russian president Vladimir Putin and announced 100 per cent sanctions on Russia as he pledged more weapons for Ukraine, including 17 Patriot missiles which Kyiv has urgently sought.

Under President Vladimir Putin, Moscow has attempted to expand its influence in the region – with mixed results.