Washington (CNN) Two Democratic lawmakers sent a letter to President Donald Trump on Friday criticizing the administration's response to Saudi journalist Jamal Khashoggi's disappearance and asking for information about what they describe as the President's "ongoing personal enrichment from Saudi government payments."

The letter, signed by Democratic Sen. Richard Blumenthal of Connecticut and Rep. Jerrold Nadler of New York, accuses the President of giving "undue credence to the Saudi government's unbelievable stories and denials," and states, "Your administration's response calls into question whether you are acting based on the American public's interests or your own private interests."

In light of that, the lawmakers say they are writing "to request additional information about your ongoing personal enrichment from Saudi government payments."

Hoping to win back the majority in the US House of Representatives after this fall's midterms, Democrats have already signaled plans to open investigations into Trump's tax returns, business interests, Cabinet secretaries and whether there was any collusion between Russia and the Trump campaign. The letter signals a new vein Democrats intend to mine, opened up by the Saudi crisis.

Nadler told CNN Friday that the Democrats will subpoena business records if they take control of the House.

Read More