We will sell Ukraine weapons, we will not be sending troops (or more accurately formal troops, as we already have 'advisors' and 'trainers' on the ground), no matter how NATO bitches (of course if we dissolve NATO, then the issue would be moot).
Ukraine is not in NATO, even if some want to treat it as though it is, and the current gov are working with Neo-Nazi's, so they are not worth defending with US lives, at all.
The US populace has no desire for another war, particularly one that might involve shooting at Russia troops and risk MAD, and the powers in DC know this.
We should wash our hands of Ukraine, because we are not the 'good guys' there, nor is the current gov there worth defending since they are so comfortable working with Neo-Nazi's.