The highly respected and eagerly awaited Des Moines Register/Selzer poll
just came out. It has the top three Romney 24%, Paul 22% and Santorum 15%. That's more or less in line with recent polls. The current TPM Poll Average
(pre-DMR data) is Romney 22%, Paul 17% and Santorum 16%.
But the write-up adds this bit of detail ...
But the four-day results don't reflect just how quickly momentum is shifting in a race that has remained highly fluid for months. If the final two days of polling are considered separately, Santorum rises to second place, with 21 percent, pushing Paul to third, at 18 percent. Romney remains the same, at 24 percent.
And look at this trend line to put that movement in perspective.
Here's current trend chart (prior to the release of the DMR poll). I've stripped out all the candidates besides Romney, Paul, Santorum and Gingrich. Santorum's the light brown line rocketing up as Paul drops down.