I think there are some in the GOP who want Mamdani to win and will vote for him, on the idiotic assumption Mamdani will win and make things in NYC so bad they will have a chance “next time”.
I remember some in the GOP who voted for Obama instead of McCain for the same reason. I did not like McCain, but Obama was absolutely worse.
You don’t know since McCain lost. I’d bet he would have been as bad.