If there is a Trump foreign policy doctrine it would likely center on the pursuit of deals, no matter the dealmakers

Not an overly enthusiastic summit participant, President Donald Trump has come to fashion the yearly gatherings more to his liking: speed dating for deals, with a cast of strongmen (no strongwomen) swapping in and out of the chair across the table.

https://www.cnn.com/2019/06/29/politics/g20-donald-trump-bin-salman-putin-xi-dictators/index.html