Putin might win. All he has to do is to hold on until January of 2025. If Trump wins, Putin will demands concessions from Zelensky in order to sign the ceasefire. No EU. No NATO. And Russia gets to keep the occupied territories.
In addition, China and Iran are problematic allies for Russia at best, and the impending seizure of Russian assets abroad will inflict considerable financial pain on Putin and his criminal and oligarch allies. And if Trump is elected in 2024, he will put the screws to Russia and Putin through a hard peace terms. If nothing else, that will end the Left's Trump-Russia line of attack and warn China and Iran that with Trump in charge, the US is not to be messed with.