Hold your horses all you "inevitable Romney" Republicans. Here comes Rick Santorum to throw a monkey wrench into Mitt's victory machine.

PPP:

Rick Santorum could be headed for a big day in today's contests in Colorado, Minnesota, and Missouri. Missouri looks like a probable win for Santorum. He's at 45% there to 32% for Mitt Romney and 19% for Paul. Minnesota provides an opportunity for a win as well. Currently he has a small advantage with 33% to 24% for Romney, 22% for Newt Gingrich, and 20% for Ron Paul. And Santorum should get a second place finish in Colorado, where Romney appears to be the likely winner. The standings there are Romney at 37%, Santorum at 27%, Gingrich at 21%, and Paul at 13%.

Santorum's personal popularity is the main reason for his sudden reemergence as a relevant player in the GOP race. In all 3 of these states his favorability is over 70%- 74/17 in Minnesota, 72/17 in Missouri, and 71/19 in Colorado. He's far better liked than his main opponents- Romney's favorability is 47-60% in those states and Gingrich's is 47-48%. While Romney and Gingrich have hammered each other in recents weeks Santorum's been largely left alone and he's benefiting from that now.

There are three groups Santorum's winning in all three of these states: Tea Partiers, Evangelicals, and those describing themselves as 'very conservative.' Those were groups that had previously been in Gingrich's column, but it appears right leaning Republican voters are shifting toward Santorum as their primary alternative to Romney. If Santorum does pick up 2 wins and a 2nd place finish tomorrow that trend is likely to be accelerated.

If Santorum can pull off a couple of wins, we'll be right back near where we started in January. Mitt's momentum will have been broken and the free for all will begin again. Both Romney and Gingrich will pile on Santorum while the next couple of primaries will favor Romney: His home state of Michigan and Arizona where he currently holds a 24% edge over Gingrich.

If you're a Democrat, you gotta be loving this.