President Donald Trump is finally losing patience with Russian President Vladimir Putin‘s disdain for honorable efforts to end the war in Ukraine.

On Memorial Day, Trump responded to a weekend of extreme Russian attacks on cities across Ukraine by threatening new sanctions. He said Putin had “gone absolutely crazy.” On May 27, he added a threat, saying only his tolerance of Putin has prevented “lots of really bad things” from happening to Russia. Putin, Trump added, “was playing with fire!”