Washington (CNN) The top Republican on the House Judiciary Committee on Sunday called for House Intelligence Committee Chairman Adam Schiff to testify before the panel in its impeachment hearing.

Georgia Rep. Doug Collins, the ranking Republican on the Judiciary Committee, is the latest ally of President Donald Trump to call for Schiff, who has been leading House Democrats' impeachment inquiry into the President and Ukraine, to provide testimony.

The House Intelligence Committee is expected to allow lawmakers to review its impeachment report on Monday ahead of a scheduled vote to approve it Tuesday. That report will detail allegations that Trump pressured Ukraine to investigate his political rivals to help his 2020 reelection effort, and withheld a White House meeting and $400 million in security aid to Ukraine.

The House Judiciary Committee will then hold its first hearing on Wednesday to consider articles of impeachment, with a panel of expert witnesses testifying.

"First and foremost, the first person that needs to testify is Adam Schiff. Adam Schiff is the author of this report," Collins told Fox's Chris Wallace on "Fox News Sunday." He said if Schiff "chooses not to testify, then I really question his veracity and what he's putting in his report."

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