when you make a deal with somebody like donald trump, you make the assumption that the terms will be broken at the earliest possible moment (unless you're a fool, i suppose, but these foreign governments are not represented by fools). as such, you sign the deal with the explicit intent to maximize concessions, because you know the other party is untrustworthy. and, if you don't get the terms you want, you don't sign because you know they'll never live up to it, anyways.

it follows that the only people that are going to be interested in making deals with donald trump are entities looking to take advantage of him; there is no other reason to sign a deal with a dishonest actor.