My own guess, based on zero inside information, is that in the end he
won’t. The people who run for president have been thinking of it since
they were 5 and will walk through walls to do so. The other politicians
think it would be nice if the country magically made them president, but
they aren’t willing to eat gravel for two years in order to have a
shot. I have always put Jeb Bush in this second category, and so far
that instinct has proved correct.
Hence all the chatter about Mitt Romney; the GOP establishment needs a candidate.