Judges are not, strictly speaking, politicians, but it is fairly easy to identify Kavanaugh as a PBP, given his overriding interest in striking down regulations. Amy Barrett, on the other hand, clearly was a Reactionary.
The core of the current GOP is the deal in which PBPs support social conservative legislation and judges in exchange for regressive tax cuts. As I’ve noted before, the events of the last several years show that the Reactionaries think they have gotten the short end of the stick. They want more, and they expect Trump to deliver.
Ross Douthat, who is a mixture of CD and Reactionary (but mostly the latter), thinks there will be hell to pay in the GOP if Kavanaugh is just a vote to nibble at the edges of Roe. That makes sense, on its face, but is he right? I think not; the Reactionaries are so committed to Trump that they would learn to live with a “moderate” justice, just as they have learned to love Putin and Kim.