There is a flurry of late Iowa polls. And the big headline is that it's basically a photo finish. That is even more so when you consider that the "viability threshold" rule in the Democratic caucuses creates what is in effect a much larger margin of error, if what we are interested in is not individual voter support across the state but who will actually get the biggest number on caucus night.

With that said, however, it is clear that there is another late breaking trend -- toward John Edwards.

The latest poll out from McClatchy/MSNBC (conducted by Mason-Dixon) has it Edwards (24%), Clinton (23%) and Obama (22%).

As you can see, the trend is also clear enough to be visible in Pollster.com/Charles Franklin trendline graph -- Hillary consolidating what had been a softening lead and Edwards finishing strong and quite possibly in line to take second place if not first.

Here's one email we got in a couple days ago from a long-time TPM Reader ...

I'm volunteering for obama in new hampshire. Out of non-Obama supporters, Edwards people are rock solid. They often aren't even interested in talking. HRC supporters are much more wavering and persuadable. They are also much more likely to say that they are considering Obama.

The other question to ask is, is Edwards close enough in New Hampshire to vault into contention if he's the big story coming out of caucus night?