When asked on CNN if he now “trusts” Mitt Romney after railing against him during the primary, especially when he consistently compared his health care plan in Massachusetts to the president’s health care plan, he gave quite a tepid endorsement.

“Well, I trust him more than I do Barack Obama,” Santorum told John King. “This election is about a choice.”

Santorum went on to say he believes Romney when he says he will “repeal Obamacare,” and that, through his new organization Patriot Voices, he will keep a watch on the presumptive GOP nominee as well as other conservative candidates to hold “their feet to the fire.”