** FILE ** Rep. Paul Ryan, Wisconsin Republican, introduces a plan on Tuesday, March 20, 2012, to overhaul Medicare. The proposal would have the federal program competing with private plans. (AP Photo/Jacquelyn Martin)

Photo by: Jacquelyn Martin

** FILE ** Rep. Paul Ryan, Wisconsin Republican, introduces a plan on Tuesday, March 20, 2012, to overhaul Medicare. The proposal would have the federal program competing with private plans. (AP Photo/Jacquelyn Martin)