Armstrong throws weight behind CA’s Prop. 29 May 11, 2012 Tweet Comments Play more videos after this? FROM THE SHOW—Lance Armstrong explains what he is doing as co-chair of a California campaign committee to pass the California Cancer Research Act, a ballot measure to raise tobacco taxes. California voters will decide on the measure June 5, 2012. Join the conversation on Facebook or Google+ and share feedback with “The Gavin Newsom Show” at @GavinOnCurrent.