Tim Stanley is a historian at Oxford University and he blogs for the Daily Telegraph. He is the author of "The Crusader: the Life and Times of Pat Buchanan," due out on February 14.

The only thing that will keep Newt Gingrich running past Florida is ego.
It's no great surprise that Gingrich lost Florida. He was dead from the moment that he clammed up in the Florida debates -- and the millions that Mitt Romney poured into the state in negative ads didn't help either. A lesser man would be crushed by this result. But Gingrich isn't just a man. He's a visionary, a historian, the inventor of supply side economics, a space marine and a latter-day Casanova. I'm getting all this off the back of one of his DVDs (just kidding).
Newt has promised to soldier on right up to the Republican National Convention in late August. To be fair, he has good cause to keep running. Gingrich is leading in the national polls, and only 5% of the total delegates have been selected thus far, so there's still a lot in play.
Most of the states are distributing their delegates proportionately to the vote that each candidate gets. That means that there is a good chance that Romney won't go to the convention with the necessary "50% plus one" that he needs to win on the first ballot. If Gingrich enters the convention with the second-largest number of delegates, he could either horse trade his way to the nomination or play kingmaker.
The above scenario is an exciting fantasy to political wonks, and the commentators have been discussing it ad infinitum. But it would require a lot of money from Gingrich and a lot of patience from the voters to work. Both are likely to run out by Super Tuesday on March 6.