CARLSBAD – Rep. Darrell Issa said Wednesday morning that he was endorsing former Republican congressman Brian Bilbray and will serve as his campaign chairman in the race to replace disgraced Rep. Randy "Duke" Cunningham in the 50th District. Pointing out that his district, the 49th, is touched on all sides by the 50th, Issa, R-Vista, said he needs a partner in Washington D.C. who has the experience and integrity to get work done on behalf of the North County. "When you are looking for someone who is trusted and proven and who has been in the arena and has been...