He's now blaming the Ukraine war on Biden--no mention of Russian aggression, the fact that they invaded Ukraine, nothing about Putin's breaking every cease fire ...
This explanation should not be necessary, but bullies attack their victims when they think they will be safe from someone stronger. Putin invaded and occupied Crimea in 2014, when OhBummer! had been signaling weakness. Putin invaded and tried to conquer all of Ukraine in 2022, when LIEden had been signaling weakness.
I'm sure some DU-Denizens understand the behaviors of bullies, but DU-Folk cannot admit that Putin sensed the LIEden weakness that DU-Folk do not acknowledge. FWIW, Putin and LIEden met face-to-face in June 2021, a bit less than 9 months before Putin's attempt to conquer Ukraine started. Given the condition and "efficiency" of Russia's military, Putin probably started invasion preparations very soon after that meeting with LIEden.