Colorado Gov. John Hickenlooper gives a thumbs up as he celebrates with members of the legislature after he signs the Civil Unions Act into law at the Colorado History Museum in Denver, Colo., on Thursday, March 21, 2013. (AP Photo/Brennan Linsley)

Associated Press
Colorado Gov. John Hickenlooper gives a thumbs up as he celebrates with members of the legislature after he signs the Civil Unions Act into law at the Colorado History Museum in Denver, Colo., on Thursday, March 21, 2013. (AP Photo/Brennan Linsley)
Colorado Gov. John Hickenlooper gives a thumbs up as he celebrates with members of the legislature after he signs the Civil Unions Act into law at the Colorado History Museum in Denver, Colo., on Thursday, March 21, 2013. (AP Photo/Brennan Linsley)