After more than a month of hearing closed-door and public testimony from more than a dozen witnesses, House Democrats will now focus on drafting a report as a part of their impeachment investigation into President Trump.

Many sought-after witnesses refused to comply with House investigators’ requests, following orders from the White House. Democrats have decided not to enter into a court fight to force those witnesses to comply; they may instead use those refusals as a plank in a possible article of impeachment, obstruction of Congress.

Complied Not complied White House Mike Pence Vice president Mick Mulvaney Acting White House chief of staff Robert Blair Top aide to acting White House chief of staff National Security Council John Bolton Former national security adviser Charles M. Kupperman Former deputy national security adviser John A. Eisenberg Top National Security Council lawyer Michael Ellis Deputy National Security Council legal adviser Wells Griffith Trump adviser on energy and climate Fiona Hill Former Trump adviser on Russia Timothy Morrison Former Trump adviser on Russia Lt. Col. Alexander S. Vindman National Security Council official Joseph Maguire Acting director of national intelligence State Department Mike Pompeo Secretary of state John J. Sullivan Deputy secretary of state T. Ulrich Brechbuhl State Department counselor Michael McKinley Former adviser to Secretary of State Mike Pompeo Philip T. Reeker Acting assistant secretary of state George P. Kent Deputy assistant secretary of state David Hale Under secretary of state for political affairs Gordon D. Sondland Ambassador to the E.U. William B. Taylor Jr. Top American diplomat in Ukraine Kurt D. Volker Former special envoy to Ukraine David Holmes Political counselor to the United States Embassy in Ukraine Marie L. Yovanovitch Former ambassador to Ukraine Jennifer Williams Foreign Service officer Catherine M. Croft Foreign Service officer Christopher J. Anderson Foreign Service officer Defense Department Mark T. Esper Defense secretary Laura K. Cooper Deputy assistant secretary of defense Budget Department Russell T. Vought Acting budget director Michael Duffey White House budget official Mark Sandy White House budget official Energy Department Rick Perry Energy secretary Brian McCormack Former chief of staff to the energy secretary Other Rudolph W. Giuliani Trump’s personal lawyer

The impeachment investigation was launched after a whistle-blower complaint alleged that President Trump had abused his power for political gain by pressuring Ukraine’s president to investigate former Vice President Joseph R. Biden Jr.