According to Rasmussen:

Perry: 29%

Bachmann: 18%

Romney: 17%

Paul: 14%

All other candidates are below 5%.

This result is significant for a number of reasons. First, this is a survey of likely caucus-goers. Well, a caucus is a big, time-consuming deal. Like the straw poll. It’s easy to say you’re going, but harder actually to go. On the eve of the Iowa straw poll, a survey of “likely straw-poll-goers” found 16% for Ron Paul. But at the straw poll, Ron got nearly 28%. This is a case where intensity of support counts, and no one can beat the congressman from Texas in that area.

On top of that, the Paul brigades have a solid four months to continue building their base, while support for the others, which is much softer, continues to fluctuate from one candidate to another.

And there is no way Perry stays at 29%.