Trump knows there is a separation of powers and respects it.
But Ryan knows that it will be Trump setting the agenda and if he balks too much he will not be Speaker for long.
I hope that is so. I am not optimistic, however. Didn’t Ryan get re-elected unanimously, or almost so? The GOPe loves him and the GOPe includes almost all the Republican members including most of the ones who began as Tea Party candidates. GOPe has functioned since Newt Gingrich as a junior division of the Democrat Party.