You are mixing streams here.

First - you mean 'graft' not 'grift'.

Second - Trump's indicating that 'the US should get a cut' is just ridiculous and bizarre. He's not getting a cut, so it's not really 'graft' - but it just plays into his deal-making instinct that the US 'is a player and ought to get a piece'. He's just blatantly ignorant. There is 0% chance of this happening, there are 0 people in his circle that would ever conceive of such a thing, it's just one of those 'Trump things' they smile and ignore.