ROCKFORD, IL - MARCH 18:  Republican presidential candidate, former Massachusetts Gov. Mitt Romney addresses supporters in an overflow crowd outside the Machine Shed Restaurant March 18, 2012 in Rockford, IL. Romney is campaigning in Illinois three days before that state's primary elections March 21, when 54 GOP delegates are up for grabs. With Romney in the lead on delegates, fellow candidate, former Pennsylvania Sen. Rick Santorum continues to compete for the 1,444 necessary to secure the nomination before the last primary, in Utah on June 26.  (Photo by Chip Somodevilla/Getty Images)
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