Sean Trende simulates the rest of the 2012 Republican presidential primary, and concludes:
Romney ends up with 1,071 delegates, still short of the nomination. Now, there are a few important caveats. First, there are 114 unpledged RNC delegates, who can vote for anyone. Second, there are another 86 delegates in states that have already voted that have yet to be allocated. Romney will probably get somewhere between a third and half of these delegates.
So a brokered convention is still a long shot, but (1) note how long it takes Romney to get into range; and (2) recall that we’ve perhaps been too generous with Romney in our delegate allocations in New York, Texas and California, especially after the brutal March he is likely about to have.
And that's with Trende being perhaps a little generous to Romney. Whole thing here.