I still think that the GOPe and the Bush family have something up their sleeve to try to manipulate the Convention to see their boy as nominee. The family seems to be prideful. With so much pride, a normal person would step aside and try to retain some measure of dignity. He’s sticking around for some reason.
If Cruz wins a good number of delegates, Rove and Priebus will DECLARE HIM INELIGIBLE and STRIP HIM OF HIS DELEGATES and give them to Jeb at the convention.
That’s why Jeb is sticking around. Jeb is counting on a brokered convention with a GIFT from Rove and Priebus of Cruz’s delegates.