Politics

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U.S. Secret Service agents watch as Republican presidential candidate, former Massachusetts Gov. Mitt Romney walks in a drizzle to board his campaign plane in Vandalia, Ohio, Tuesday, Oct. 30, 2012, as he travels to Tampa, Fla. for a campaign stop. (AP Photo/Charles Dharapak)

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Republican presidential candidate and former Massachusetts Gov. Mitt Romney steps off his campaign plane in Tampa, Fla., Tuesday, Oct. 30, 2012. (AP Photo/Charles Dharapak)

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Destroyed buildings line a desolated street in the Bustan Al-Pasha district of Aleppo, Syria, on Tuesday, Oct. 30, 2012, after several weeks of intense battles between rebel fighters and the Syrian army. (AP Photo/Narciso Contreras)

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** FILE ** Part of the Yarmouk military complex in Khartoum, Sudan seen in a satellite image made on October 25 2012, following an alleged attack. A U.S. monitoring group says satellite images of the aftermath of an explosion at a Sudanese weapons factory suggest the site was hit by an airstrike. The Sudanese government has accused Israel of bombing its Yarmouk military complex on Oct 23, killing two people and leaving the factory in ruins. (AP Photo/ DigitalGlobe via Satellite Sentinel Project, File)

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Republican presidential nominee Mitt Romney loads a truck with supplies Tuesday in Kettering, Ohio, during a rally to raise donations for those affected by Hurricane Sandy. Mr. Romney encouraged unity during the event while avoiding attacks on President Obama. (Associated Press)

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FILE - In this Oct. 17, 2012 file photo, Republican presidential candidate and former Massachusetts Gov. Mitt Romney campaigns at Ida Lee Park in Leesburg, Va. (AP Photo/Charles Dharapak)

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President Obama has been campaigning often in Virginia. Some of the 2008 Obama magic is gone, and some down-ballot Democrats are keeping their distance. (Associated Press)

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Republican vice presidential candidate, Rep. Paul Ryan, R-Wis. waves to supporters while arriving at the Atlanta Aviation in Moon Township, Pa. on Saturday, Oct. 20, 2012. (AP Photo/Post-Gazette, Lake Fong)

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** FILE ** Republican presidential candidate, former Massachusetts Gov. Mitt Romney shakes hands with a supporter while collecting donations at a storm relief event, Tuesday, Oct. 30, 2012, at James S. Trent Arena in Kettering, Ohio. (AP Photo/Al Behrman)