The campaign manager for Republican gubernatorial candidate David Williams is stepping down to pursue other professional opportunities, leaving the GOP nominee without anyone to run his day-to-day operations.Luke Marchant joined the campaign in May to replace Scott Jennings, a former special assistant to President George W. Bush, who stayed on as a consultant.After a lackluster performance in the GOP primary, Marchant's hiring was seen by political observers as a move to court Tea Party voters. He previously served as a special assistant to U.S. Sen. Marc Rubio, R-Fl, who is a Tea Party favorite in Congress.Asked about a possible replacement, the Williams campaign downplayed the absence of a campaign manager and instead looked ahead to a forum in Louisville next week."Nothing to announce on that right now," says Jennings. "But our candidate has one of the best political minds in the state and he's got a great team that is moving forward executing the various functions of a campaign."