It sounds like POTUS is restricting how much high tech weaponry we can export, partly based on the probability of our enemies getting their hands on our tech, and the potential of those we sell to being able to get replacement parts from other vendors.
This almost sounds like it's directed at Israel. They sell our tech to other nations quite often (China), which in turn has allowed other nations (China) to make spare parts for them.
So POTUS just made sure that our allies that buy our weaponry can't get our good stuff, can only get spare parts from us, and have to be trusted enough to not transfer our tech to our enemies.