Republican presidential candidate and former Massachusetts Gov. Mitt Romney boards his campaign plane at Weyers Cave-Shenandoah Valley Airport in Weyers Cave, Va., Friday, Oct. 5, 2012. (AP Photo/Charles Dharapak)

Photo by: Charles Dharapak

Republican presidential candidate and former Massachusetts Gov. Mitt Romney boards his campaign plane at Weyers Cave-Shenandoah Valley Airport in Weyers Cave, Va., Friday, Oct. 5, 2012. (AP Photo/Charles Dharapak)