"he probably extracted something for the USA's benefit." Yes, we await to see exactly what.
Trump would have known the massive hole that Turnbull would be in if the deal got scrapped and he loves a bit of leverage.
Art of the Deal could have been written about Turnbull in that conversation: "The worst thing you can possibly do in a deal is seem desperate to make it. That makes the other guy smell blood, and then you're dead."
