The district’s Attorney General Karl Racine and Maryland’s Brian Frosh made the request to the US District Court in Maryland.
The Foreign Emoluments Clause of the Constitution bars federal officials from accepting gifts or rewards from foreign government officials; the Domestic Emoluments Clause says the president cannot accept benefits from state governments.
The hotel is just a stone’s throw from the White House and several visiting dignitaries and state officials appear to have stayed at the hotel as paying guests.
Mr Trump’s legal team has attempted to stop the case, but the judge, Peter Messitte, ruled in July 2018 that it can go forward.
This is the first case involving the emoluments clauses to ever go to trial.
Since Mr Trump placed his assets in a blind trust before he took office, the attorneys general have asked for other documents as well.
They have requested, as part of the “document discovery” phase of the case, the hotel’s business records with foreign government officials and records of money flowing from the hotel to the trust, and records from the General Services Administration of the federal government which leases the hotel to the Trump Organisation.
The attorneys general have also asked for records from the US Treasury Department which handles the lease payments for the hotel.
The case has run into some roadblocks as the Department of Justice, defending the president has asked the case be stalled until a critical question has been decided by Mr Messitte – whether to include Mr Trump as an individual in the case not just in his official capacity.