In the survey of registered voters, 49 percent would vote for Obama today. On the other side, 45 percent would vote for Mitt Romney. And Rick Santorum's buzz appears to be ever-fading: Obama has an 8-percentage point lead over him, and he gets above the 50-percent threshold in that theoretical matchup.
Let's look at the differences among this poll and the last few. It's basically a 180 from February's poll, which had Romney with a 4-percentage point lead. And it's Obama's first lead since December, when he held a 50 percent to 48 percent advantage over the likely GOP nominee.