Everything about Fiorina’s background suggests that she is a PBP. However, her passionate prattling about abortion was her most memorable moment (other than her interactions with Trump) at the last debate, which means we don’t have a definitive answer at this point.
I would hope that the candidates will be asked a question about the debt ceiling and government shutdowns at the next debate. That will be the acid test. Anyone who is even willing to consider refusing to lift the debt limit is a Reactionary. What will Fiorina say? My guess is that she will out herself as a PBP, and her support on the far right will collapse as a result.