Because he's a terrible candidate who did an abysmal job defending himself. He can go be a man of God in another capacity. America needs that Senate seat back.
he’s already survived a leftist supported smear campaign
No, he didn't "survive" it... he produced one of the most improbable outcomes in the modern age -- losing a reliable Senate seat in a reliably conservative state.
Pray tell, how would *YOU* defend yourself against a massive media onslaught accusing you of being a child molesting rapist for months and months?
How does "Perfect candidate" deal with such an accusation and the deliberate backstabbing by Richard Shelby and other prominent Republican officials?
How do you fix that sort of problem?