Time to add Bill Pascoe, a former GOP operative now blogging at CQ Politics, the editors of National Review (via Andrew Sullivan), and Mary Katherine Ham of The Weekly Standard to the growing list of conservatives (headed by Michael Medved) who have denounced the Obama birth certificate myth. As I noted yesterday, even Ann Coulter and American Spectator editor R. Emmett Tyrell Jr. have disowned it. When will leading members of the GOP do the same?

Update 7/29 11:39 AM: Per Jay’s comment below, I’ve retitled this post (previously, it was “More conservatives exit birther bandwagon”).

Update 7/29 12:38 PM: Per the last sentence of the post, I’m delighted to see that GOP chairman Michael Steele has finally spoken out against the birther movement (via Ben Smith). Here’s the key portion of the statement that was provided to Greg Sargent by an RNC spokesperson: “Chairman Steele believes that this is an unnecessary distraction and believes that the president is a U.S. citizen.”

Update 7/29 3:09 PM: One step forward, two steps back — conservative talk radio host Hugh Hewitt is also denouncing the myth, but Rep. Roy Blunt just called the issue a “legitimate question” and Rep. Louie Gohmert signed on yesterday as a cosponsor of Rep. Bill Posey’s birther-inspired bill in Congress.