The pushback follows Trump’s encroachment on almost every congressional prerogative — from taking control of the power of the purse to threatening tariffs.

Authorizing foreign wars is the job of U.S. lawmakers, but recent presidents have stretched their own powers to engage in global conflicts.

Donald Trump is currently considering whether to join Israel in bombing Iran – a seismic decision which could cause chaos across the Middle East and beyond. The UK is particularly nervous to see what the mercurial president does next,