Barack Obama maintains the same 49 percent to 44 percent lead in today’s Gallup daily tracking poll that he held on Friday, but the survey reported a slight shift in the general election match-ups with Obama and John McCain tied at 45 percent each. McCain leads Clinton 47 percent to 45 percent. Gallup notes that this is one of the few daily snapshots in which McCain’s support has dropped enough to put him in a tie with either Democrat.