Exactly eight months after the 2012 mass shooting in Aurora, Colorado, Hickenlooper signed bills into law requiring universal background checks on all gun transfers in Colorado except gifts between immediate family members and banning magazines with more than 15 rounds. Although most Coloradans supported the measures, according to polling by the "Denver Post", the bills' opponents gathered enough signatures to trigger special elections leading to the ousting of Democratic state senators John Morse and Angela Giron and the resignation of Evie Hudak.