From the report:
“With three weeks to go in the campaign, Obama appears to be losing momentum, and now trails Romney by four percentage points among likely voters. That contrasts with his seven-point win over McCain in 2008. Given this shift in overall voter preferences, it follows that Obama will have lost support among at least some subgroups of the electorate. Those losses are not proportionate across all subgroups, however. He shed the most support among Southerners, college graduates, postgraduates, 30- to 49-year-olds, men, and Protestants. He also lost a moderate amount of support among whites, Easterners, women, and Catholics — while not building new support elsewhere.