One thing about Elijah Cummings; he writes the best letters! They are all inclusive, minutely detailed, cover all appropriate bases and tend to be “short-termed” as it relates to response deadlines expected! They are epic you should read a few.. 

During a press conference on Wednesday, President Trump was asked if he would cooperate with the House impeachment inquiry.  He responded, ‘I always cooperate.’  President Trump’s claim is patently false.  The White House has refused to engage with—or even respond to—multiple requests for documents from our Committees on a voluntary basis.  After nearly a month of stonewalling, it appears clear that the President has chosen the path of defiance, obstruction, and cover-up,” the Chairmen wrote.”

“White House Subpoenaed in House Impeachment Inquiry
Oct 4, 2019 Press Release

“The President has chosen the path of defiance, obstruction, and cover-up.”Washington, D.C. (Oct. 4, 2019)—Today, Rep. Elijah E. Cummings, the Chairman of the Committee on Oversight and Reform, Rep. Adam Schiff, the Chairman of the Permanent Select Committee on Intelligence, and Rep. Eliot L. Engel, the Chairman of the Committee on Foreign Affairs, sent a letter [1] conveying a subpoena to White House Acting Chief of Staff Mick Mulvaney for key documents as part of the House of Representatives’ impeachment inquiry of President Donald Trump.

US House Chairs Subpoena White House: “The President Has Chosen The Path of Defiance, Obstruction, & Cover-Up”