@Reb Eliezer-
She already proved that she’s our enemy and we can’t rely on her. Even if you don’t know if you can trust him you should vote for him since it can’t get much worse.
As far as his family is concerned- while him marrying a non-Jew is against Halacha it’s not immoral. Besides- we’re voting for him for his policies, not for the way he acts in his personal life.
If his marriage bothers you so much why did you vote for President Biden if he committed adultery with Jill while she was married to someone else. That’s both against Halacha and immoral.