Opponents of the effort to add a ban on gay marriage to the Indiana constitution say they will announce a new coalition Wednesday that comes with bipartisan firepower (Murray, Indianapolis Star). The kickoff for the coalition, called Freedom Indiana, comes as gay-rights groups and allies gear up for the fight next year in the General Assembly — and, if necessary, at the ballot box. Several groups will be joined at noon in Downtown Indianapolis’ Artsgarden by supportive companies, including Eli Lilly and Co. and Cummins. Also on hand will be a new campaign manager who is a veteran of Republican campaigns. Freedom Indiana will be run by Megan Robertson, the group said. She managed last year’s winning campaign of U.S. Rep. Luke Messer, R-Ind., an opponent of gay marriage, and was his communications director until recently. Robertson also managed Indianapolis Mayor Greg Ballard’s reelection campaign in 2011, was political director for U.S. Sen. Dan Coats’ 2010 campaign and has worked on other campaigns. She was not available for comment Tuesday. “She’s absolutely what we need, and she knows what to do,” said Rick Sutton, executive director of Indiana Equality Action, which lobbied unsuccessfully against the amendment before the legislature approved it in 2011. He will be the coalition’s president…The coalition will face off against supporters of the amendment as well as Indiana legislative leaders who are clearing its way and Indiana Gov. Mike Pence, a Republican who has voiced support.