Supposed front-runner Romney had a bad night; he came in second in Colorado and Missouri and third in Minnesota. Oddly, no delegates were won today. Missouri was a popularity contest, while the other two chose delegates who will attend a state convention where delegates will be voted on. For an explanation of this, see the Yahoo News article.
Santorum has now won four states, Romney has won three, and Gingrich has won one. If you see momentum as an important factor in politics, at this point Santorum appears to have it. Who would have guessed?
For Republicans, this is the oddest political year in recent memory.