It seems like there's no way that Biden can make any negotiation with Russia seem like a win to his base so if he wins it's almost an automatic 4 more years of war. But if Trump wins he could make most of the concessions that Russia wants and still sell it as "the best deal" to his fans. Is a trump win the best hope for shortening war?
Disclaimer: I would never vote for trump, I also won't vote for Biden, I'm also in a state that always goes one way so it doesn't matter at all.
I kinda think Trump is the rare exception to our consensus on foreign policy. He doesn't care about any of the "inside baseball" perspectives in Washington. For him, politics is 100% spectacle -- he doesn't have hard beliefs about foreign policy in the way that our typical politicians do. I could see him trying to end the war just so he could say "I succeeded where Joe couldn't!"