US President Donald Trump said he was disappointed with Russian leader Vladimir Putin, but did not refuse to engage with him. He also threatened Russia with new tariffs, reports the BBC. After meeting with the NATO Secretary General at the White House,

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

“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.”

President Donald Trump revealed Monday that his effort to bring Russia to the table for meaningful peace talks to end the Ukraine war was a hard sell for one of the most important people in his orbit -- first lady Melania Trump.

Vladimir Putin’s conduct has prompted Donald Trump’s shift as Russia’s war effort in Ukraine has gotten only more aggressive.

US President Donald Trump has said he's "disappointed but not done" with his Russian counterpart, Vladimir Putin, who is showing no signs of ending the war in Ukraine.

President Trump said that he's disappointed with Russian President Vladimir Putin, but that he's "not done with him" during an interview on BBC News, a CBS News partner. On Monday, Mr. Trump threatened tariffs targeting Russia if a peace deal with Ukraine isn't reached within 50 days.

U.S. President Donald Trump repeatedly said during his campaign he would be able to end the war between Russia and Ukraine “in 24 hours” upon taking office.