Republican presidential candidate Mitt Romney, followed by his vice presidential running mate, Rep. Paul Ryan, walks off Mr. Romney's plane in Cleveland on Tuesday, Nov. 6, 2012. Mr. Ryan arrived moments earlier on his own plane and met Mr. Romney on board. (AP Photo/Charles Dharapak)

Photo by: Charles Dharapak

Republican presidential candidate Mitt Romney, followed by his vice presidential running mate, Rep. Paul Ryan, walks off Mr. Romney's plane in Cleveland on Tuesday, Nov. 6, 2012. Mr. Ryan arrived moments earlier on his own plane and met Mr. Romney on board. (AP Photo/Charles Dharapak)