Moore has been a strong critic against Presidents Ronald Reagan, Bill Clinton, and George W. Bush. He supported Ralph Nader in the 2000 presidential election, and Barack Obama over Hillary Clinton in the 2008 presidential election. In December 2015, Moore announced his support for Vermont Senator Bernie Sanders in the upcoming 2016 United States presidential election. Moore has stated that Sanders is a "candidate not to be messed with" and showed his support for Sanders' debate performances.