Grand Haven TribuneMichigan GOP plans March 2016 presidential primary, potential for winner take allMLive.comRepublican presidential candidates former Pennsylvania Sen. Rick Santorum, left, Rep. Michele Bachmann, R-Minn., former House Speaker Newt Gingrich, former Massachusetts Gov. Mitt Romney, businessman Herman Cain, Texas Gov. Rick Perry, Rep.Michigan GOP eyes March 2016 presidential primaryKansas City Starall 18 news articles »