In this Jan. 30, 2012 file photo, Mitt Romney sings "America the Beautiful" as he campaigns at Lake Sumter Landing, The Villages, Fla. (AP Photo/Charles Dharapak, File)

 

              In this Jan. 30, 2012 file photo, Mitt Romney sings "America the Beautiful" as he campaigns at Lake Sumter Landing, The Villages, Fla. (AP Photo/Charles Dharapak, File)
In this Jan. 30, 2012 file photo, Mitt Romney sings "America the Beautiful" as he campaigns at Lake Sumter Landing, The Villages, Fla. (AP Photo/Charles Dharapak, File)