Rep. Adam Schiff Adam Bennett SchiffOvernight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies Intelligence chief says Congress will get some in-person election security briefings Democrats, advocates seethe over Florida voting rights ruling MORE (D-Calif.) declined to comment on whether the House would subpoena former national security adviser John Bolton John BoltonThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep DOJ launches probe into Bolton book for possible classified information disclosures Gary Cohn: 'I haven't made up my mind' on vote for president in November MORE after the topic came up during an interview Sunday.

CBS’s Margaret Brennan asked Schiff, the head House impeachment manager in President Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE's impeachment trial, if Bolton would be subpoenaed in the lower chamber following the Senate’s likely acquittal of Trump.

“I don't want to comment to this point on what our plans may or may not be with respect to John Bolton,” Schiff said on "Face The Nation."

“But I will say this: whether it's before – in testimony before the House or it's in his book or it's in one form or another, the truth will continue to come out,” he added.

Will the House subpoena @AmbJohnBolton? "Whether it's in testimony before the House or it's in his book or it's in one form or another, the truth will come out as we'll continue to come out," @RepAdamSchiff says https://t.co/SJt6ddzJHx — Face The Nation (@FaceTheNation) February 2, 2020

The House Intelligence Committee chairman’s comments come two days after the Senate voted not to include additional witnesses and documentation in the impeachment trial.

He criticized the Justice Department for releasing a court filing including two dozen emails detailing the president’s involvement in withholding aid to Ukraine after the vote Friday.

"That shows you the lengths to which the President's lawyers are going to cover this up," he said, adding: "but they're going to fail. Indeed, they've failed already."

Last week, The New York Times revealed a section of Bolton’s manuscript stated that Trump had been directly involved in withholding the aid until the country agreed to investigate former Vice President Joe Biden Joe BidenThe Memo: Warning signs flash for Trump on debates Senate Republicans signal openness to working with Biden National postal mail handlers union endorses Biden MORE and his family.

Before that, the president’s legal team had been arguing in the impeachment trial that Trump did not directly say to hold back the aid. Democrats pushed for senators to support Bolton testimony during the trial but were unsuccessful.

The impeachment trial is expected to end this week with Trump’s acquittal, but the House would still have the ability to subpoena Bolton.