Tide shifts to Obama in most competitive states - Article Photos 1/5

Republican presidential candidate and former Massachusetts Gov. Mitt Romney speaks to supporters during a rally Friday, Sept. 21, 2012, in Las Vegas. Romney campaigned in Nevada as aides released a 2011 federal income tax return showing he and his wife, Ann, paid $1.94 million in federal taxes last year on income of $13.7 million. (AP Photo/Julie Jacobson)