Yet those who have become extremely concerned about the economy since last fall show no significant difference from everyone else in backing a presidential candidate. Both groups divide about evenly between Republican John McCain and Democrat Barack Obama, and between McCain and the other Democrat, Hillary Rodham Clinton. In addition, those who expressed most concern about their personal financial situations have done just what those less concerned have done – they are a bit likelier to back McCain now than they were to prefer a Republican candidate in last November’s AP-Yahoo News poll.