Bloomberg has Obama up 13 points. Rasmussen has Romney up 2.

I mention these because they’re the most recent polls, and they’re polls of Likely Voters, not just Registered Voters.

Now that’s an 11-point difference. Rasmussen’s sample is about double the size, but that’s the only noticeable difference.

So unless Bloomberg is heavily weighting Democrats, I can’t figure out what’s causing the difference.

Except to say that polls, at this stage of the race, are largely bunk.