That suggests to me,he has been paid off with the promise from the GOPe, that it will be HIS TURN NEXT TIME to run for president. There simply can not be another motive for him to coninue on, other that to split the vote and insure a Romney win. Nothing else makes sense at this point.
WE will remember this Rick. I will never vote for you as President, if it proves out that you remained in this race for SELF SERVING reasons.
If I see Santorum in the next POTUS cycle I will burn my GOP Card.