It remains to be seen just how lasting and severe President Donald Trump’s turn against Vladimir Putin will be. Trump has criticized the Russian president in unprecedented terms in recent days and signaled he’ll send vital weapons to Ukraine.

President Vladimir Putin believes Russia's economy and its military are strong enough to weather any additional Western measures, sources said.

“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.”

Russian President Vladimir Putin has sacrificed an estimated 1 million of his soldiers, killed and wounded, in a three-year campaign to crush Ukraine. Now President Donald Trump is betting that his go-to economic weapon — tariffs — can succeed where Ukrainian drones and rockets haven't,

Pres. Trump has denied reports that he asked Pres. Zelenskyy to strike deeper into Russia, but said he is increasingly "disappointed" with Putin's ongoing heavy bombing of Ukraine.

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

President Trump threatens Putin with 100% tariffs if no Ukraine peace deal is reached within 50 days, while confirming arms sales to NATO to support Ukrainian resistance.

Trump tells the that he trusts "almost no-one" in a wide-ranging phone call on the war in Ukraine, Nato and the UK.

President Donald Trump announced this week that the U.S. will send Patriot air-defense missiles to Ukraine and threatened new tariffs on Russia. Will Vladimir Putin back down? What should Trump's next move be? And what does the future hold for Ukraine? Newsweek contributors Daniel R. DePetris and Dan Perry debate: