“Then, then I was told in some uncertain terms that not only could I not have him on, I could not mention me not having him on. And because my network clearly doesn’t want us to talk about this, let’s talk about this.”
Colbert, host of The Late Show, went on to explain that new FCC guidance on the “equal time” rule – which requires TV and radio broadcasters to give equal time to rival political candidates – could have created legal trouble for the network, according to CBS lawyers.
The FCC regulates radio, TV and satellite airwaves, giving it power over a range of matters, including mergers and decency complaints.
CBS flatly denied Colbert’s claims in a statement on Tuesday.
“The Late Show was not prohibited by CBS from broadcasting the interview with Rep James Talarico,” the network said.
The statement added: “The show was provided legal guidance that the broadcast could trigger the FCC equal-time rule for two other candidates… and presented options for how the equal time for other candidates could be fulfilled.
“The Late Show decided to present the interview through its YouTube channel with on-air promotion on the broadcast rather than potentially providing the equal-time options.”
The full interview was later posted on YouTube, where FCC rules don’t apply.
News content has traditionally been exempted from the “equal time” rule.
But the FCC has said the rule may soon apply to late-night programmes, like Colbert’s. It may also apply to political radio programmes, which tend to skew Republican.
After issuing the new guidance in January, Brendan Carr, the FCC chairman known for taking an expansive view of his power, said on X that “for years, legacy TV networks assumed that their late night & daytime talk shows qualify as ‘bona fide news’ programs – even when motivated by purely partisan political purposes.
“Today, the FCC reminded them of their obligation to provide all candidates with equal opportunities.”
Trump has at times said he is considering pulling the FCC license for several US networks who he says have aired views that are critical of his presidency.
Paramount Global, the parent company of CBS, last July agreed to pay $16m (£13.5m) to settle a legal dispute with President Donald Trump regarding an interview it broadcast on CBS with former Vice-President Kamala Harris.
Business commentators have said the deal was made partly so as to not affect Paramount’s planned merger with Skydance Media, which Trump had the power to halt.
Anna Gomez, the only Democrat on the FCC, condemned the response by CBS, saying it had the First Amendment constitutional right to free speech.
“This is yet another troubling example of corporate capitulation in the face of this administration’s broader campaign to censor and control speech,” Gomez said in a statement, adding that the FCC has “no lawful authority to pressure broadcasters for political purposes”.
She continued: “It is no secret that Paramount, CBS’s parent company, has regulatory matters before the government, but corporate interests cannot justify retreating from airing newsworthy content.”
She has previously accused the FCC’s Republican leaders of using the equal time rule to unfairly penalise critics in violation of the constitutional right to free speech.
The Late Show is due to end it’s 33-year run in May. Colbert has been the host since 2015.