You don't have to trust her. She's not running for office. She's just a talking head/author. Sometimes she's right; sometimes not so much. With her acerbic wit, she can sometimes make a point better than anyone else.
Yea we do have to trust her as she is a main pundit on the right and people are influenced by her more than most people they elect.
And if she runs interference for her lib buddies with her vote Romney BS, Conservatives lose votes and libs gain them because of her.