Trump praised Paul Ryan at a Wisconsin event last night:

There a couple of things notable about this: 1) It’s vintage Trump, entertaining and a little tongue-in-cheek; 2) It more or less states explicitly how transactional this relationship will be (Trump jokes that he won’t be praising Ryan if he crosses him); 3) It not so subtly expresses who has the whip hand in the relationship right now, with Trump pointing at Ryan and saying the two of them are going to work on the wall.