Mitt Romney

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Republican presidential candidate Mitt Romney shakes hands Oct. 8, 2012, during a campaign rally in Newport News, Va. (Associated Press)

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Republican presidential candidate Mitt Romney gives a foreign policy speech at the Virginia Military Institute in Lexington, Va., on Monday, Oct. 8, 2012. (AP Photo/ Evan Vucci)

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Republican presidential candidate Mitt Romney gives a foreign policy speech at the Virginia Military Institute in Lexington, Va., on Monday, Oct. 8, 2012. (AP Photo/Evan Vucci)

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Republican presidential candidate Mitt Romney gestures during a foreign policy speech at the Virginia Military Institute on Monday, Oct. 8, 2012, in Lexington, Va. (AP Photo/Evan Vucci)

Vietnam veteran David Snyder of Metamora, Ohio, watches a live video broadcast of Republican presidential candidate Mitt Romney during a campaign event with Mr. Romney's running mate, Rep. Paul Ryan, on Monday, Oct. 8, 2012, in Swanton, Ohio. (AP Photo/Mary Altaffer)

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Cadets at the Virginia Military Institute listen as Republican presidential candidate Mitt Romney gives a foreign policy speech on Oct. 8, 2012, in Lexington, Va. (Associated Press)

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Cadets at the Virginia Military Institute listen to Republican presidential candidate Mitt Romney give a foreign policy speech on Monday, Oct. 8, 2012, in Lexington, Va. (AP Photo/Evan Vucci)

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Republican presidential candidate Mitt Romney arrives to make a foreign policy speech at the Virginia Military Institute on Monday, Oct. 8, 2012, in Lexington, Va. (AP Photo/Evan Vucci)

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Cadets at the Virginia Military Institute pray before a foreign policy speech by Republican presidential candidate Mitt Romney on Monday, Oct. 8, 2012, in Lexington, Va. (AP Photo/Evan Vucci)

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Republican presidential candidate Mitt Romney delivers a foreign policy speech at the Virginia Military Institute in Lexington, Va., on Monday, Oct. 8, 2012. (AP Photo/Charles Dharapak)

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Republican presidential candidate Mitt Romney arrives to deliver a foreign policy speech at the Virginia Military Institute in Lexington, Va., on Monday, Oct. 8, 2012. (AP Photo/Charles Dharapak)

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Republican presidential candidate Mitt Romney delivers a foreign policy speech at Virginia Military Institute in Lexington, Va., on Monday, Oct. 8, 2012. (AP Photo/Charles Dharapak)

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** FILE ** Republican presidential candidate Mitt Romney delivers a foreign policy speech at the Virginia Military Institute in Lexington, Va., on Oct. 8, 2012. (Associated Press)

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Republican presidential candidate Mitt Romney delivers a foreign policy speech at the Virginia Military Institute in Lexington, Va., on Monday, Oct. 8, 2012. (AP Photo/Charles Dharapak)

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Republican presidential candidate Mitt Romney greets cadets after delivering a foreign policy speech at the Virginia Military Institute in Lexington, Va., on Monday, Oct. 8, 2012. (AP Photo/Charles Dharapak)

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Republican presidential candidate Mitt Romney delivers a foreign policy speech at the Virginia Military Institute in Lexington, Va., on Monday, Oct. 8, 2012. (AP Photo/Charles Dharapak)