Barack Obama has a 4 point lead over John McCainAs the run upto the US Presidential elections is getting hotter, Democrat Barack Obama maintains a thin lead over Rival republican John McCain. Currently Obama has built a 4 point lead over John McCain.In terms of percent Obama is at 48% and McCain is at 44%."Obama seems to be doing well among the groups that he really needs like women and independents," pollster John Zogby said. "McCain needs to do much better with them."&quot