With two SCOTUS justices close to retiring, there won’t be a conservative movement (social, defense, or economic) if a Democrat wins. The perfect isn’t the enemy of the good.
Last I’ll say about the Mayor: I don’t see much “liberalism” in him, except for his stare decisis on Roe v. Wade. The nation is not NYC, and I really doubt, coming from a hegemonic leftist jurisdiction, that he’ll grab everyone’s guns and make the US a Sanctuary Nation. He did work for Reagan.