When to me it's so so so obvious that the very best thing you could do to make negotiations with Trump go well, is to have options. For it to be clear you have alternatives to his "deal", and they're good ones. That you can walk away more than he can.
"Oh, Mr Trump we'd love to join your gang and buy your stuff, but our businesses they've been making our own drone program and they're really great. Everyone says they're the best drones ever. I think next year you'll be buying from us. ...oh, you've got an offer to make? Guess I'll hear it."