Is The Race Tightening?

Maybe, says Nate Cohn:

Even if Obama's lead has shrunk in recent polls, it's important to emphasize that Obama retains 49 or 50 percent in every recent survey. Instead, the tightening is mainly due to latent Romney supporters returning to his column, leaving him with about 47 percent in the most recent polls, and that should not be interpreted as evidence of a fundamental shift in his direction.

Silver adds:

First, although it’s unclear whether Mr. Obama’s polls have already begun to decline, it’s more likely than not that they will tighten some between now and the election.