The impeachment inquiry Democrats opened is about to consume American politics. What did we learn and where's it headed?

What did they know, and when did they know it? New reports show how the whisleblower complaint made its way to the Oval Office.

National Security Council officials from prior administrations say a top-secret system reserved for highly sensitive government secrets should not be used for transcripts of foreign leader calls.

Washington is closing out a week that included a vortex of developments involving President Trump, Congress and the 2020 election. Here's what may be around the corner.

The document provided a detailed picture of concerns from some U.S. officials about Trump's requests for political favors from the Ukrainian president and the steps that his personal lawyer, Rudy Giuliani, allegedly took towards that goal.

The complaint, released by the House intelligence committee, details accounts by White House officials about a phone call they treated differently from others, but perhaps not for the first time.

A whistleblower inside the intelligence community filed a complaint about President Trump's conversation with a foreign leader.

House Democrats who are now mulling Trump's impeachment are hoping that Joseph Maguire will explain why he withheld the intelligence community whistleblower's complaint from Congress for weeks.

Kerry called the House's impeachment inquiry into President Donald Trump a "constitutional imperative" on Wednesday.

The record shows Trump telling Zelensky he wants a "favor" from him, and also telling him speak with Attorney General William Barr and his own personal lawyer, Rudy Giuliani.