They will destroy Haley and DeSantis just as surely as they did Trump.
They have already been destroyed - by us.
I had a short conversation yesterday with a retired political science professor who used to identify as a Republican. My last conversation with him was in 2017 when he was hoping for Trump to be removed via the 25th amendment. He now admits to being a Democrat and says there are only two Republicans he could support--Christie and Haley.