GPO submits list of witnesses it wants to appear before House Intelligence Committee, including anonymous whistleblower

Former US national security adviser could be a star witness for House inquiry, and would testify against strong opposition from White House

House Democrats to launch a new phase of their inquiry, with State Department officials set to testify about US president's dealings with Ukraine

Trump's ambassador to the EU, Gordon Sondland revises testimony, according to fresh transcripts released by House investigators

Charles Kupperman explains he is waiting for 'judicial clarity' on whether he should obey Congress or the president

President tweets that he won't allow ambassador to testify before 'a totally compromised kangaroo court;' Schiff calls move further evidence of obstruction of Congress

New York representative says president using classic anti-Semitic canards by depicting head of the House Intelligence Committee as 'shifty'

As Democratic leaders put White House on notice that wide-ranging subpoena coming for info on Trump’s Ukraine actions, president goes on defensive with name-calling, expletives

US president’s attacks come amid escalating impeachment fight over his effort to pressure the government of Ukraine to investigate Biden

House leaders warn US administration not to intimidate potential witnesses in impeachment probe, announce plans to subpoena White House over Ukraine scandal