Looks like someone should have read this article first 
 
How to Negotiate With Someone Like Trump – And Win
So, how should you negotiate effectively with someone like Trump? Many world leaders seem to believe that they must either obtain more power than him (which is theoretically correct, but close to impossible for most to achieve in the short term), ignore the power difference altogether and attempt to negotiate as equals, or just give in to avoid the pain or risk of confronting his hard tactics and suffering his retaliations. These are three basic mistakes that will send any negotiator toward failure in this context.
2. Don’t publicly make them look bad
People like Trump 
care about their image. Eroding their image is akin to attempting to 
reduce their power, which will likely invite a strong and immediate response. Yet, there are many negotiators whose approach has been based on trying to make Trump look bad. It’s critical to understand that power is not bravado. Trump will attempt to negotiate collaboratively with those like Russian president Vladimir Putin who, given the latter’s position as the head of a nuclear superpower, he doesn’t have a large power advantage over. However, he is unlikely to do the same with someone who acts like Putin but lacks the power to back it up.
Having a power advantage usually means that Trump can sustain the consequences of a conflict better or longer than the other side can. It’s naïve to expect that he will not try to restore his image by gaining one up on his counterparty, or that he will disregard his image and prioritise the deal’s economics. As such, those who make Trump – or anyone borrowing from his playbook – look bad publicly are likely to pay the price later unless they are powerful enough to avoid it.