Gadol, you can’t be serious about Ukraine. First thing Biden declared was – we are surely not going to send soldiers. First thing Trump did when Russian contractors moved towards US base in Syria – bombed them. Trump also supported Eastern European countries in their armament, posting US troops there, and blocking Nord Stream2 that Biden immediately rescinded.
(To be fair, I don’t think Trump issued the command, he simply put capable people in charge, and delegated this decision to Pentagon; Pentagon delegated that decision to the local commander, who did what he needed to do).