Los Angeles: Donald Trump and Michael Moore are embroiled in a Twitter war of words over Moore's recent Broadway show.

The US President fired the first verbal volley, taking a potshot at Moore's play, The Terms of My Surrender, in the midst of a series of tweets about First Responders Day and the JFK files.

Trump did not attend the production, at which Moore made a point of reserving a box seat at every performance for the President.

But early on Saturday evening, Trump tweeted, "While not at all presidential I must point out that the Sloppy Michael Moore Show on Broadway was a TOTAL BOMB and was forced to close. Sad!"

Terms of My Surrender closed last week and while it's true the show was a middling performer at the box office, it wasn't poor sales that forced it to close.