Read: Witness opening statements in first Judiciary Committee impeachment hearing

The Capitol in Washington on Dec. 4, 2019. - Copyright Tom Brenner Reuters

By NBC News with NBC News Politics

Published on 04/12/2019 - 15:26

Three are testifying at the behest of the panel's Democratic majority, while the fourth was called by the GOP.

The witnesses called before the House Judiciary Committee Wednesday as part of the ongoing impeachment inquiry into President Donald Trump include Harvard law professor Noah Feldman, Stanford law professor Pamela Karlan, University of North Carolina law professor Michael Gerhardt and George Washington University law professor Jonathan Turley.

The first three are testifying at the behest of the panel's Democratic majority, while Turley was called by the GOP.