Currently, as I see it, Biden is For Ukraine, and Trump is Against Ukraine.
Biden is pro-war and Trump is anti-war.
Biden is anti-war, his administration is very focused on avoiding escalation. Trump is not anti-war, he is just Pro-Russian. If Trump would be in charge now with all that Israel stuff, the US would already be involved in a war with Iran. At the very least, strikes against Iranian proxies would be far more frequent.
Why does Biden still help Ukraine? Because it is in American interests, it is a very cost-efficient way to hurt Russia. But Biden's administration is anything but hawks.
Letting Ukraine bleed so that Russia can bleed isn't entirely pro-Ukraine.
WTH do you mean by "letting Ukraine bleed"? It sounds like you are saying "Ukraine is fighting because American masters told them to." which is frequently used by Russian propaganda. Or do you mean that without American assistance Russia will quickly win and the war will stop?
It is not how it works. Syrian opposition fought for years with no airforce or air defense. Hamas resists Israel for several months and they are basically light infantry with limited supplies. Small Chechnya fought Russia for many months being armed even worse than Hamas. Ukrainian army will become something like that without assistance. Russians will still need to punch through urban areas leveling them to the ground and fighting increasingly desperate Ukrainian units.
Also, Ukraine is quite big. Russia won't be able to occupy all of it quickly. Without Western assistance, we will lose air defense, meaning that our industry will be mostly destroyed but the country will still have enough left to go into total war mode, with total militarization of the economy, war rationing, harsh mobilization, etc. Russia will need years of extremely bloody war to finish.