More on the Iowa Polls

Here's David Yepsen--who has covered more caucuses than (even) me--on the meaning of the polls.

And here's the most important thing you should know about Iowa:

Finally, the polls show 69 percent of the Democrats and 77 percent of the Republicans say they could be persuaded to change their minds.

That will be true, I would guess, until the last two weeks of the campaign.