President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE on Friday indicated that he would block former national security adviser John Bolton John BoltonDiplomacy with China is good for America The 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 MORE from testifying in the Senate’s impeachment trial, arguing that allowing him to do so would undermine his office's authority.

“I think you have to for the sake of the office,” Trump told Fox News’s Laura Ingraham Laura Anne IngrahamSean Hannity and Lou Dobbs to be deposed in Seth Rich lawsuit: report NYC living statue shows Trump desecrating graves of war dead, COVID-19 victims American Airlines will allow employees to wear Black Lives Matter pins MORE when asked if he would use executive privilege to block testimony from Bolton.

“Especially a national security adviser,” he added. “You can’t have him explaining all of your statements about national security concerning Russia, China and North Korea — everything. We just can’t do that.”

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The president rattled off several other officials he said he would like to testify, including acting White House chief of staff Mick Mulvaney Mick MulvaneyMick Mulvaney to start hedge fund Fauci says positive White House task force reports don't always match what he hears on the ground Bottom line MORE, Secretary of State Mike Pompeo Michael (Mike) Richard PompeoHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers Treasury Dept. sanctions Iranian government-backed hackers The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep MORE and former Energy Secretary Rick Perry Rick PerryOVERNIGHT ENERGY: Democrats push resolution to battle climate change, sluggish economy and racial injustice | Senators reach compromise on greenhouse gas amendment stalling energy bill | Trump courts Florida voters with offshore drilling moratorium OVERNIGHT ENERGY: Trump signs major conservation bill into law | Senate votes to confirm Energy's No. 2 official | Trump Jr. expresses opposition to Pebble Mine project Senate votes to confirm Energy's No. 2 official MORE but said allowing them to do so could hurt future presidents.

“I would love everybody to testify,” Trump said. “I'd like Mick to testify. I'd like Mike Pompeo to testify. I'd like Rick Perry to testify. I want everybody — but there are things that you can’t do from the standpoint of executive privilege.”

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The comments mark a doubling down by Trump, who signaled earlier this week he would block Bolton from appearing before the Senate.

“So we have to protect presidential privilege — for me but for future presidents,” he said.

Bolton said in a statement Monday that he would be willing to testify in a Senate impeachment trial if subpoenaed, even over administration objections. Democrats have clamored to hear from the former national security adviser because of his intimate knowledge of Trump’s dealings with Ukraine, the focal point of the impeachment articles against him.

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Bolton described the effort by administration officials to press Ukraine for investigations into former Vice President Joe Biden Joe BidenCast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response Biden tells CNN town hall that he has benefited from white privilege MORE, a chief political rival, and Biden's son Hunter as a “drug deal,” according to witnesses who testified in front of the House during its impeachment inquiry. Bolton’s attorneys have also said he has relevant information on meetings and conversations regarding Ukraine.

However, the Senate seems set to pass a resolution defining the parameters for its trial that does not include provisions for witness-calling, with Republicans apparently in agreement on rules for the proceedings.

The House impeached Trump in December for abuse of power and obstruction of Congress after Democrats say he made security aid and a White House meeting for Ukraine contingent on the country announcing investigations that could help him politically.