First, what laws are violated? Doubt international law touches this, US law maybe?
edit: Why the F do you downvote me? This is an honest question. I really dislike Trump, but I don't see what laws this violates, except maybe US laws regarding the separation of powers-
I have a kindle, but I never buy my books at Amazon. I just but them elsewhere, de-DRM them on calibre and copy them to the kindle. Not as comfortable, but okay for me.