President Donald Trump vowed vengeance against NBC News' Kristen Welker on Sunday after the "Meet the Press" host commented that the power of the president's endorsement record has "faded in recent weeks" following a "string of primary losses".

"Kristen Welker, the Unpopular 'Hostess' of the once great Meet the Press, now considered Meet the Fake Press, just stated that Donald Trump has 'mixed results' on his Endorsements of Candidates, when the recent WINS of Darline Graham and Mike Mazzei, stand at 100% for the U.S. Senate, and 98% for the U.S. House, recently and over the longterm," Trump wrote on his social media platform Truth Social.

"How can anyone be allowed to say this, working for freely given Public Airwaves? Results are attached. Because of this purposeful inaccuracy, she will be reported to the FCC for rebuke or punishment."

The threat is the latest in a pattern of Trump targeting broadcasters and news organizations whose coverage he disputes. The Federal Communications Commission, an independent agency whose five members are appointed by the president and confirmed by the Senate, regulates broadcast licensing but its authority over news content is constrained: the Communications Act and the First Amendment bar the agency from censoring or punishing stations based on the viewpoints of their journalism, a point FCC officials and legal experts have repeatedly emphasized during previous clashes between Trump and networks. Welker, as an individual journalist rather than a license holder, is not herself subject to FCC licensing actions.

Trump has clashed with Welker over the years, most recently during a fiery interview in June in which Welker pressed the president on his false claims of election fraud in the 2020 election. Trump ultimately stormed out of the interview after shouting down Welker and NBC News as a "one-sided, crooked network."

"Unfortunately, she is not the only one. The Radical Left News is going out of their way to harass, demean, and libel anything 'TRUMP,'" Trump continued.

"Their new weapon is to say that my 99% SUCCESS Rate on Endorsements, 100% on Senatorial Endorsements (Many of whom were not even given a shot of winning until I Endorsed!), is either a mixed result, or not very good. In actuality, it is, without question, the strongest Endorsement in the History of Politics. If it were not, I would be the first to admit it."

Despite Trump's claims, four of his endorsements for governor failed to win their respective nominations, and two Trump-backed congressional candidates — including Rep. Andy Ogles, who lost his Tennessee House primary — lost their primaries in July. The results come amid broader questions about the strength of Trump's sway over Republican primaries heading into the November midterms, where control of Congress is at stake and both parties are watching endorsement outcomes as one measure of the president's influence over the party's base.