I don’t believe that is fair. Rubio may not have a good conservative posture on some/several issues but I don’t think abortion is one of them. Maybe I am mistaken but that is what I recall.
Do I have doubts about his amnesty position? You betcha.
He is trying to undue the damage that he did to himself joining Reid Schumer and Obama and so he figures that abortion is the safest issue for him to join conservatives on.
The Priebus/Bohner/Cantor group made this decision.