This would also add COUNTLESS voters who lean Trump but distrust his sincerity on fighting the status-quo because the Repubs have screwed us over so many times. THIS---firing Ryan immediately---would be PROOF that Trump is going to do what he says he's going to do.
Reading online, listening to talk radio---the top political story is Trump backing off or perception that he's backing off of his tough immigration stand. That will kill him, IMHO. His supporters, like me, have used that in all of our debates, conversations and arguments with our conservative friends who are never-Trumpers.
That's caused by a mix of bombast by Trump and rank misrepresentation by the press. Trump making an exception for the mayor of London ... the mayor of London wants to immigrate to the US? I don't think so!!
It's like the press-fiction, "he's reversed and now is willing to raise taxes on the rich." All he said was that his starting point was just a starting point, and whatever tax rate Congress agreed to would probably be greater than his starting point, but still lower than today. Did he change his position? To hear the press talk, he sure did.
The same thing will happen with immigration. The rules are complex, Byzantine even, and there is also lawsuits and so on that will limit his ability to get things done.
You are wasting your time trying to change a #NeverTrumper. Do something besides politics if you enjoy being around them, and if they bring up politics, excuse yourself from the scene. They vote for whoever floats their boat, if they vote at all.