President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE on Monday announced that he's planning to nominate Justin Muzinich, a Treasury Department aide who was involved in the administration's tax-cut efforts, to be deputy secretary of the department.

If confirmed, Muzinich would fill the No. 2 position at Treasury. The department hasn't had a Senate-confirmed deputy secretary since Trump took office.

Since the start of the administration, Muzinich has served as counselor to Treasury Secretary Steven Mnuchin Steven Terner MnuchinShutdown clash looms after Democrats unveil spending bill Lawmakers fear voter backlash over failure to reach COVID-19 relief deal United Airlines, unions call for six-month extension of government aid MORE. In that role, he has advised Mnuchin on domestic and international policy issues such as Republicans' successful efforts to pass tax legislation.

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Before joining Treasury, Muzinich was president of an investment firm and taught at Columbia Business School. He also previously worked on Jeb Bush's presidential campaign.