Trump announced Monday he is nominating former Wisconsin Rep. Sean Duffy for transportation secretary.

The position requires Senate confirmation.

"He will prioritize Excellence, Competence, Competitiveness and Beauty when rebuilding America’s highways, tunnels, bridges and airports," Trump said in a statement. "He will ensure our ports and dams serve our Economy without compromising our National Security, and he will make our skies safe again by eliminating DEI for pilots and air traffic controllers."

Duffy co-hosts "The Bottom Line" on Fox Business and is a Fox News contributor.

-ABC News' Hannah Demissie

Trump is expected to attend Tuesday's SpaceX launch in Texas, multiple sources told ABC News.

SpaceX said it is planning to hold the sixth integrated flight test of its Starship megarocket from its Starbase in Cameron County, Texas, on Tuesday afternoon.

SpaceX founder Elon Musk, who will co-lead the Department of Government Efficiency, has rarely left Trump's side since the election -- appearing in family photos with Trump at Mar-a-Lago and even traveling with him to New York for Saturday’s UFC fight.

Trump frequently marveled at the intricacies of the SpaceX rocket launch while on the campaign trail.

"It was so exciting, so I'm watching it, and this monstrous thing is going down, right and it's coming down, it's first of all, doing all sorts of flips up in the air,” Trump said at his last campaign rally of the cycle in Grand Rapids, Michigan.

-ABC News' Kelsey Walsh, Lalee Ibssa and Katherine Faulders

All eyes will be on the House Ethics Committee's expected closed-door meeting this Wednesday -- but it's possible that Congress can go around the committee entirely to release the panel's findings on former Rep. Matt Gaetz.

According to House rules, any member of Congress can go to the floor and tee up a vote on a "privileged resolution" that would force the Ethics Committee to release its report on Gaetz, within two legislative days.

The member would only have to argue that not releasing the report impacts the "dignity" or "integrity" of the House or "reputation" of its members.

The action would be unusual, but not unprecedented. In the 1990s, Democrats repeatedly tried to force the Ethics Committee to divulge information about investigations into then-Speaker Newt Gingrich.

Those efforts came up short because Republicans closed ranks around Gingrich and the majority. But Gaetz is incredibly unpopular on Capitol Hill, and it would only take a handful of Republicans -- along with all Democrats -- to pass the resolution.

"If you're a member of Congress, do you really want to be in the business of defending Matt Gaetz?" former Rep. Charlie Dent, R-Pennsylvania, who led the Ethics Committee, said to ABC News on Monday.

The Ethics Committee was investigating allegations of sexual misconduct and illicit drug use against Gaetz, who resigned last week after being named Trump's pick for attorney general.

If the Ethics Committee doesn't vote to release its findings on Wednesday, expect more Democrats to raise the possibility of forcing a floor vote -- one that would force Republicans on the record about Gaetz.

-ABC News' Benjamin Siegel

The National Guardsman who in 2021 pegged Pete Hegseth as a potential "insider threat" clarified in an interview with ABC News that his complaint targeted a "Deus Vult" tattoo on the Fox News host's arm, not a cross on his chest, as Hegseth has repeatedly claimed.

As Reuters and The Associated Press first reported, Sgt. DeRicko Gaither sent an image of the "Deus Vult" tattoo to Maj. Gen. William Walker shortly before President Joe Biden's inauguration. The phrase, which translates to "God wills it," has since been co-opted by white nationalist groups.

"This information is quite disturbing, sir," Gaither wrote in the email to Walker, who has not responded to ABC News' request for comment. "This falls along the lines of (an) Insider Threat."

Hegseth -- Trump's pick for defense secretary -- claimed in his book, "The War on Warriors," that he was removed from service ahead of Biden's inauguration because fellow servicemembers had flagged a tattoo of the Jerusalem Cross on his chest as a white nationalist symbol.

But Gaither clarified in a text message to ABC News that his complaint targeted the "Deus Vult" tattoo, despite "the narrative that has been out there."

"Just so we are clear. This has NOTHING to do with the Jerusalem Cross tattoo on his chest," Gaither said. "This has everything to do with the 'DEUS VULT' Tattoo on his inner bicep."

Gaither, who confirmed the contents of his complaint to ABC News, emphasized that "this wasn't then and isn't now a personal attack towards Pete Hegseth."

"The information received and [the] email sent on January 14th was the protocol that had to be followed because of the position assignment that I was assigned to," explained Gaither, who was at the time assigned as the Guards' head of security. "The protocol was followed and would be followed again if this issue involved any other service member, myself included."

Hegseth fired back at the initial coverage of this matter in the AP by claiming it was "Anti-Christian bigotry."

"They can target me -- I don’t give a damn -- but this type of targeting of Christians, conservatives, patriots and everyday Americans will stop on DAY ONE at DJT's DoD," Hegseth wrote on social media on Friday.

-ABC News' Nathan Luna and Lucien Bruggeman