Regular Fox News guest Sean Parnell on Wednesday announced that he will challenge Democratic Rep. Conor Lamb in Pennsylvania's 17th Congressional District.

President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE praised Parnell earlier this month during a visit to Pittsburgh, saying he would be a formidable challenger to Lamb.

"I am so excited to announce that today I'm declaring my candidacy for the great people of Pennsylvania's 17th District for Congress of the United States," Parnell, an Army veteran, said in an appearance on "Fox & Friends."

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"I think that Pennsylvanians and specifically the people of western Pennsylvania deserve leadership that truly represents them," he continued. "Right now, my opponent does not represent them at all."

"He is a self-described moderate Democrat, but the truth of the matter is that he's voted in lockstep with [Speaker] Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds MORE 98 percent of the time, and the policies that he's advocating for would be absolutely devastating to the people of western Pennsylvania," he said.

In the Pittsburgh visit a few weeks ago, Trump hinted that Parnell would run for Lamb's seat, calling him a “fantastic military man.”

“There’s a guy named Sean Parnell, who is a fantastic military man. Brilliant. Got everything going," Trump said. "And I heard, fellas — maybe my genius congressman can tell me — I hear that Sean is going to — Sean Parnell is going to run against Conor Lamb. That will help the energy business a lot. And he should win. He should win. And Sean will vote for us, and he’ll work for us."

Lamb, a Marine veteran and rising star in the Democratic Party, defeated former Rep. Keith Rothfus (R-Pa.) in the only national race pitting two incumbents against one another in 2018 after the 17th District was redrawn.

The congressman is also facing another GOP challenge from Air Force veteran and small business owner Scott Timko.

The Cook Political Report rates the state's 17th Congressional District as "likely Democratic."