The sixth Democratic primary debate, which begins at 8 p.m. ET, features the smallest — and least diverse — group of candidates yet.

The findings draw from hours of depositions and hearings. The House Judiciary now takes over the next phase of the inquiry, potentially drafting articles of impeachment against President Trump.

On Oct. 26, Reeker told lawmakers that senior State Department officials blocked him from helping Marie Yovanovitch, the former U.S. ambassador to Ukraine who was the subject of a pressure campaign.

Mark Sandy testified behind closed doors on Nov. 16 regarding the House impeachment inquiry. The OMB is central to questions about how military aid to Ukraine was delayed.

Former Russia Director for the National Security Council Fiona Hill as well as David Holmes, a U.S. diplomat from the U.S. Embassy in Kyiv, are testifying in the inquiry.

Congress will hear from three witnesses on Wednesday, most notably U.S. Ambassador to the European Union Gordon Sondland.

The House Intelligence Committee is hearing from four more witnesses on Tuesday, including Ukraine specialist Lt. Col. Alexander Vindman and former National Security Council official Tim Morrison.

The under secretary of state for political affairs allegedly knew about the White House's push to recall Marie Yovanovitch, the former U.S. ambassador to Ukraine.

In his closed-door deposition on Oct. 31, Morrison said President Trump had indeed asked Ukraine's president for assistance, but he argued the president's conduct wasn't unlawful.

The House of Representatives voted on Oct. 31 to formalize its impeachment inquiry into President Trump. Here is what Democrats said on the record ahead of that vote.

FBI Director Christopher Wray and former special counsel Robert Mueller both warned this week about the perils to the 2020 presidential race. What would the candidates do about it?

Roughly 40% of House Democrats are advocating for opening an impeachment inquiry against the president. Robert Mueller's testimony Wednesday may be a critical moment for lawmakers on the fence.