Republican presidential candidate and former Massachusetts Gov. Mitt Romney pauses as supporters cheer to remarks during a rally Friday, Sept. 21, 2012, in Las Vegas. (AP Photo/Julie Jacobson)

Associated Press
Republican presidential candidate and former Massachusetts Gov. Mitt Romney pauses as supporters cheer to remarks during a rally Friday, Sept. 21, 2012, in Las Vegas. (AP Photo/Julie Jacobson)
Republican presidential candidate and former Massachusetts Gov. Mitt Romney pauses as supporters cheer to remarks during a rally Friday, Sept. 21, 2012, in Las Vegas. (AP Photo/Julie Jacobson)
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