If and when Paul Ryan succumbs, the speaker can expect Trump to perform the same kind of victory dance over his fallen body, because he has no respect for anybody other than himself.
In recent days I've had people suggest that if Trump is somehow elected, it won't be so bad because Republicans in Congress and in Washington would be able to rein him in. That thought process baffles me. They haven't been able to stand up to his bullying at any point in this process, and for the moment he is still Donald Trump, private citizen. Will Republicans who kowtow to him now suddenly find their backbones once they have to refer to him as "Mr. President"? Is Trump himself going to grow more amenable to guidance once he's elected president of the United States of America and they start playing "Hail to the Chief" every time he enters a room?
No. The bullying and arrogance now on display would grow exponentially should Trump ever get the power of the presidency behind him. They will be applied in every aspect of the job, from congressional relations to foreign policy, with disastrous results. That's not a maybe, that's a guarantee. And people who today proclaim themselves aghast at the fact that Hillary Clinton disobeyed the rules about establishing an email system will stand by and applaud obediently as Trump ignores every rule, law and custom established to rein in executive power. They love him because he promises to be the strongman, the Big Man, and he shows every intention of making good on that promise.