The lawsuit is the first case where Trump has sued to try to stymie House Democrats’ investigations into the President. But the court filing is only the first skirmish in what’s likely to be a multi-front war between House Democrats and Trump, the White House and the President’s businesses.

Trump and the Trump Organization filed suit Monday to stop the House Oversight Committee — chaired by Rep. Elijah Cummings, D-Maryland — from obtaining financial records from Mazars, an accounting firm that Trump used to prepare financial statements. The committee subpoenaed for 10 years’ worth of Trump’s financial records after the firm requested a so-called “friendly subpoena.”

A separate panel, the House Judiciary Committee, has issued a subpoena for special counsel Robert Mueller’s unredacted report and underlying evidence, and chairman Jerry Nadler of New York has said he will go to court to obtain those records.