Republican presidential candidate and former US Senator Rick Santorum meets with campaigners on March 4, 2012 in a BBQ at Memphis, Tennessee. Republican frontrunner Mitt Romney and main challenger ... more 

Republican presidential candidate and former US Senator Rick Santorum meets with campaigners on March 4, 2012 in a BBQ at Memphis, Tennessee. Republican frontrunner Mitt Romney and main challenger Santorum head into Super Tuesday's voting bonanza with their eyes on one or two key states that could tilt the race in their favor less