Assuming that the USA version of protecting Ukraine would involve the deaths of maybe two or three million civilians.
https://www.rferl.org/a/belarus-ukra.../28764925.html
Might as well just leave troops at the borders after "training" battles. Thing is, Ukraine has no nukes and they are technically mostly white people. Upside is that they do have a lot of stuff to plunder, which probably says more for Putin taking it, than the US "protecting" it.