Republicans aren't only worried about what might come out of Paul Broun's mouth. Here are others who have party strategists worried.
Ken Buck: "You can choose who your partner is. I think birth has an influence over [homosexuality], like alcoholism and some other things, but I think that basically you have a choice." Senate debate in 2010
Any list of disastrous Republican Senate candidates since 2010 always includes Christine O'Donnell, Sharron Angle, and Todd Akin, but Buck should be on it, too. The 2010 GOP nominee in Colorado cost the party a winnable seat by running a gaffe-prone campaign that let Sen. Michael Bennet squeak out a victory. No misstep was more prominent than the one when, during a nationally televised debate on Meet the Press, he called being gay a choice and compared it to alcoholism. The sharp-edged social conservatism doesn't play well in increasingly liberal Colorado.
Mark Harris: "There is not the medical evidence that an individual that chooses the homosexual lifestyle is born that way. That is a choice." Interview on Speak Out Charlotte in July 2013
Harris would be a newcomer to office, but not to politics. The Baptist pastor last year led the movement in North Carolina to adopt a constitutional amendment banning gay marriage, a measure that passed overwhelmingly. But a renewed debate over same-sex marriage is the last thing national Republicans want, especially as public support for it swells. Harris would dash those plans, and his unapologetic evangelicalism will make him prone to other rhetorical mistakes.