(CNN) A federal judge has finalized the schedule for when state challengers suing President Donald Trump over proceeds from the Trump International Hotel get to seek evidence for their case.

Judge Peter Messitte has ordered that the initial disclosure of evidence occur by the end of the month in a lawsuit brought by the DC and Maryland state attorneys general. They should receive the rest of the evidence they seek, as well as depositions, by June.

They allege in the lawsuit that the President violated a constitutional clause banning gifts and advantages from foreign and domestic governments because of his family company's stake in the Trump hotel in Washington.

Maryland and DC have said the Trump International Hotel's operations put other nearby hotels and entertainment properties at a competitive disadvantage, and that the Trump hotel got special tax concessions for the hotel, which won its lease on a federally owned property before Trump's election.

D.C. Attorney General Karl A. Racine applauded Monday's ruling, saying subpoenas are in the works: "We will now serve subpoenas to third party organizations and federal agencies to gather the necessary evidence to prove that President Trump is violating the Constitution's emoluments clauses -- our nation's original anti-corruption laws."

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