For the record, Romney has to obtain something like 47% of all remaining delegates to reach the 1144 needed for an automatic majority nomination, Santorum needs to get about 65% of the remainder. It sounds impossible for Santorum to make it over the top, but it's hardly inconceivable that Romney could get less than half of all remaining votes, especially if any bit of his money dries up. When he has to spend six times as much as Santorum to achieve slightly better than parity in places like Ohio, that is a campaign on a rickety platform.
Interesting parsing from the exit polls: in Ohio at least, Romney and Santorum were about equally matched in preference (about 35-40% apiece) for all voters, except those with incomes over $200,000 who Romney ran away with, just enough to push him into victory. Wealthy people tend to vote in higher percentages than other demographics by average (greater political literacy, personal interest, ability to take off a Tuesday afternoon), and don't vary much between elections. Pollsters have actually seen a noticeable increase in voter turnout among the highest-polled-for income brackets across almost every race in the Republican primary, virtually all of them saying they're for Romney. He actually is a "Movement Candidate" - it's a movement of wealthy people.
Also, the Democratic primary in Ohio, a primary with essentially one name on the ballot, had higher voter turnout than any one Republican's total votes. Yes, Romney got 457k votes, and the Ohio Democratic Party got about 480k people to turn out to cast a purely symbolic vote for Obama in their primary. Intriguing. Meanwhile, leprechaun Representative Dennis Kuicinich
lost his primary renomination for his redistricted seat. Yes, he won't be losing his Congressional seat because of redistricting, he'll be departing Congress because a different Democrat foisted him out.
And just because it's my thread,
here's a Sarah Palin word salad for you. Yeah yeah, posted by Think Progress, it's her on Fox and it was on YouTube's frontpage.