I’m not so sure. The USA is more likely to ask the EU why is it that they cannot have the backstop instead of the U.K.....
It’s about as likely as Boris Johnson going interailing around Europe to be honest.
Ireland and the Irish vote is a very important political issue in the USA always has been for it’s politicians, before you factor in the economics of the European market. The emotional, popular opinion and economic praticaticaties make the UK the smelly kid in the class and very isolated, but I guess that’s the point really.
The USA will hold a significant sway or leverage in this yet in my opinion.