House Budget Chairman Ryan introduces U.S. Republican presidential candidate Romney as he addresses supporters at Lawrence University during a campaign stop in Appleton

House Budget Chairman Paul Ryan (L) (R-WI) introduces U.S. Republican presidential candidate Mitt Romney (R) as he addresses supporters at Lawrence University during a campaign stop in Appleton, Wisconsin, March 30, 2012. REUTERS/Darren Hauck (UNITED STATES – Tags: POLITICS ELECTIONS)