With the clock ticking to Michigan's Feb. 28 primary, Gov. Rick Snyder hasn't decided whom to endorse as the Republican presidential nominee.

The governor, who has said many times he wouldn't announce his endorsement until 30 days before the primary, has 20 days left to figure out his choice.

"He's still deciding," spokeswoman Sara Wurfel said Wednesday. "He's evaluating things in terms of candidates and jobs."

Bill Ballenger, editor of the Inside Michigan Politics newsletter, said there might be more to Snyder's reticence.

"Maybe Mitt Romney's asked him not to -- I'm not sure how much help that would be at this point," Ballenger said.