WASHINGTON (AP) — A resurgent Rick Santorum hopes to spring his next big surprise in Michigan. Newt Gingrich looks for a campaign revival in the Bible Belt. Mitt Romney has his home state of Massachusetts, and the luxury of picking his spots elsewhere, if not everywhere, as the race for the Republican presidential nomination roars back to life.After a brief midwinter lull, the Republican field faces a cross-country series of nine primaries and four caucuses between Feb. 28 and Super Tuesday on March 6.