It is an absurd position that the US should be on the hook to indefinitely pay for any war anywhere in the world forever, and if they attempt to negotiate peace while pulling out of that war that they are siding with the opposition.
The problem is not that the U.S. is trying to negotiate for peace, the problem is that the administration is doing a hilariously bad job of it by giving up all leverage right off the bat.
We don't have any leverage against Russia. America has no appetite to fight them directly. If Ukraine were more effective at hurting Russia where it counts, then we might have leverage but the last few years have shown that they are not capable of that.
US should be on the hook to indefinitely pay for a particular war that resulted out of a diplomatic agreement (Budapest memorandum) that effectively prevented Ukraine from defending itself by making it surrender its nukes in exchange for nebulous security guarantees that weren't honored by US.
