If it furthered his political power, yes.
Wallace was an opportunist AND a racist.
What makes him so vile is that he WASN'T a racist, he just pretended to be (and in doing so, legitimized segregation's last stand) in order to gain power for himself. He'd be on board with the likely winner (Hillary) judging by his characteristics, but were he alive today and Trump managed to win, I could see him really quickly jumping ship to the GOP if it served his interests.
Endorsing Hillary would do him no favors in Alabama.