Trump has been unable to coax significant concessions from Putin on a negotiated peace with Ukraine, and the Russian leader has intensified the war recently. Hours after Trump’s

President Trump warned Russian President Vladimir Putin that he's "playing with fire" in Ukraine on Tuesday, the latest in a series of unusually sharp criticisms from Trump toward the Russian leader.

U.S. President Donald Trump warned Vladimir Putin Tuesday that he was "playing with fire," launching a fresh broadside at his Russian counterpart over stalled Ukraine peace efforts. Trump's latest comments came after he called the Kremlin leader "CRAZY" over the weekend following a mass Russian air attack on Kyiv,