Since neither Newt nor Santorum is even remotely likely to lock up the nomination, capturing 1,144 delegates before the GOP convention in Tampa, let's suppose that Newt's aim is merely to prevent Romney from doing so.
Would Newt do Romney more damage by remaining in the race or by dropping out?
I repeat. The rules with which the Republican National Committee has blessed us are too complicated, and the variables--money, polling data, media attention--are too numerous. Nobody knows.
Herewith a dispassionate analysis by the excellent political scientist, Matthew Dickinson of Middlebury College. If you find yourself scratching your head when you read it, you're with me.