(CNN) - Casting continues for HBO's upcoming movie "Game Change," based on the bestselling book that chronicled the 2008 presidential campaign.
Four-time Oscar-nominated actor Ed Harris is set to play John McCain, the 2008 Republican presidential nominee, according to a release from HBO.
Julianne Moore was cast this month as Sarah Palin, McCain's running mate in the last election.
HBO said the film will focus on McCain's losing campaign. Time Warner is the parent company of CNN and HBO.