President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE on Tuesday announced plans to nominate Barbara Barrett as the next Air Force secretary.

The president shared his choice via Twitter, adding that he believes Barrett "will be an outstanding Secretary!"

I am pleased to announce my nomination of Barbara Barrett of Arizona, and former Chairman of the Aerospace Corporation, to be the next Secretary of the Air Force. She will be an outstanding Secretary! #FlyFightWin — Donald J. Trump (@realDonaldTrump) May 21, 2019

Barrett is the former chairwoman of The Aerospace Corporation, a federally funded research center for national security and military space systems.

She previously served in the Reagan and George W. Bush administrations, first as the deputy administrator of the Federal Aviation Administration (FAA) and later as the U.S. ambassador to Finland.

If confirmed by the Senate, she will replace outgoing Secretary Heather Wilson, who will step down at the end of the month.

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Rep. Adam Kinzinger Adam Daniel KinzingerFox News reporter defends confirming Atlantic piece despite Trump backlash: 'I feel very confident' GOP lawmaker defends Fox reporter after Trump calls for her firing Lindsey Graham: 'QAnon is bats--- crazy' MORE (R-Ill.), who serves in the Air National Guard, previously expressed interest in being considered for the post.

Sen. Martha McSally Martha Elizabeth McSallyThe Hill's Campaign Report: Presidential polls tighten weeks out from Election Day Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' New ABC/WaPost poll finds Trump edging Biden in Arizona, Florida MORE (R-Ariz.) welcomed Barrett's nomination in a statement, saying she advocated for her nomination with the Trump administration.

“Ambassador Barrett is a force to be reckoned with and who has the leadership, experience, and knowledge to lead our Air Force into the future during a time of increased global threats,” McSally, a veteran and member of the Senate Armed Services Committee, said in a statement.

Wilson has served in the role since May 2017. An Air Force veteran and former Republican congresswoman from New Mexico, she announced in March that she would leave to become president of the University of Texas at El Paso.

Her departure followed reports that her relationship with President Trump had soured amid the debate over his desire to establish a standalone "Space Force."

She tweeted Tuesday evening that tapping Barrett is a "wonderful choice" by Trump, and shot down a suggestion that Trump was being "shady" by announcing Wilson's replacement during her farewell ceremony.

"Ambassador Barrett is an accomplished leader with a heart for service," Wilson tweeted.

Not shady at all! Wonderful choice by the President! — Dr. Heather Wilson (@SecAFOfficial) May 21, 2019

Great choice by @realDonaldTrump Ambassador Barrett is an accomplished leader with a heart for service. https://t.co/GMN0Jf8nMk — Dr. Heather Wilson (@SecAFOfficial) May 21, 2019

Air Force Under Secretary Matt Donovan will take over as the service's acting secretary beginning June 1 while a full-time replacement is confirmed.

There are several nominees for high-level positions in the Trump administration awaiting Senate confirmation, including Defense secretary, FAA administrator, ambassador to the United Nations and head of the Federal Emergency Management Agency.

Updated at 6:08 p.m.