Republican presidential candidate Rick Santorum holds up a piece of oil as he addresses the Detroit Economic Club in Detroit

 
Republican presidential candidate Rick Santorum holds up a piece of oil as he addresses the Detroit Economic Club in Detroit
Republican presidential candidate Rick Santorum holds up a piece of oil he said he got in North Dakota as he addresses the Detroit Economic Club during a campaign stop in Detroit, Michigan February 16, 2012. REUTERS/Rebecca Cook (UNITED STATES - Tags: POLITICS BUSINESS ELECTIONS)