If a walkout does occur, it ought to be fun to read the MSM coverage about how warmly and enthusiastically he was met at CPAC and how it’s clear that he’s way out in front for 2016 with Conservatives.
The MSM is occasionally useful as a reliable reverse-barometer.
I think the DBM will play it as a huge rift in the GOP and reinforce the myth that the GOP is populated with a bunch of extreme right wing ideologues.