Elena Moore

Elena Moore is an editorial assistant for NPR's Washington Desk working as the researcher for the 2020 campaign. She previously worked at NBC News and is also a proud former Washington Desk intern. Moore is a graduate from The George Washington University in Washington, D.C., and is originally from Brooklyn, N.Y.

Updated at 10:30 a.m. ET

Julián Castro, the only Latino candidate in the Democratic field, has ended his presidential campaign.

Castro released a video on Twitter on Thursday, saying that his campaign had "stood up for the most vulnerable people" and had "given a voice to those who are often forgotten."

He adds in the video: "I'm not done fighting. I'll keep working toward a nation where everyone counts."

Castro served as secretary of housing and urban development in the Obama administration and, before that, was mayor of San Antonio, Texas.

The top seven Democratic presidential candidates will appear on stage in Los Angeles Thursday night in the sixth debate of the year.

The debate comes just one day after President Trump became the third president of the United States to be impeached by the House of Representatives.

Here's what you need to know:

House impeachment investigators have released the transcript of the deposition of Mark Sandy, a career staffer for the White House Office of Management and Budget.

Sandy was deposed by lawmakers on Nov. 16 and was the lone person from the OMB to testify. Top-ranking political appointees to the OMB — including Russell Vought, its acting director — refused to comply with the investigation's requests, citing advice from the White House counsel's office.

As part of the impeachment inquiry, the House Intelligence Committee has released the transcript of the testimony by Philip Reeker, the acting assistant secretary of state who is responsible for European affairs.

Reeker testified for eight hours on Oct. 26, complying with a subpoena despite pressure from the White House to defy the request.

According to a source familiar with his testimony, Reeker was prevented by high-ranking State Department officials from aiding Marie Yovanovitch, then U.S. ambassador to Ukraine, before she was recalled from her position.

Two more witnesses testify Thursday morning in front of the House Intelligence Committee, marking the end of this week's public impeachment hearings.

Fiona Hill, the former Russia director for the National Security Council, and David Holmes, a U.S. diplomat from the U.S. Embassy in Kyiv, are appearing before investigators.

Over the past three days, lawmakers have spent hours questioning a total of nine U.S. officials (including Hill and Holmes).

No additional hearings have been announced by the Intelligence Committee.

Fiona Hill

House committees have released the transcript of David Hale's testimony before the impeachment inquiry.

Hale, the under secretary of state for political affairs, is the third-highest-ranked official at the State Department. He allegedly knew about the White House's push to recall Marie Yovanovitch from her post as U.S. ambassador to Ukraine.