 This continued to be a concern in some earlier primary states, but as the season progressed Obama showed electoral success with white voters in states like Virginia and Wisconsin.In a poll by the University of Iowa in July and August 2007 of Iowa Republicans, Obama received the third-highest percentage, with 7 percent of the vote—more than Republican candidates Mike Huckabee, Sam Brownback, and to-be nominee John McCain combined.Polls by the Washington Post and ABC News indicated that Republicans and independents were more likely than Democrats to answer that Obama would be the Democrats' best chance to win the election.