The Federal Communications Commission is scrutinizing Stephen Colbert’s vulgar joke about President Trump on “The Late Show” this week, according to Chairman Ajit Pai, and will consider a possible fine.

“I have had a chance to see the clip now and so, as we get complaints — and we’ve gotten a number of them — we are going to take the facts that we find, and we are going to apply the law as it’s been set out by the Supreme Courtand other courts, and we’ll take the appropriate action,” Pai said Thursday on Philadelphia radio station WPHT-AM.

On his late-night comedy show on CBS Monday, Colbert said of the president: “The only thing your mouth is good for is being Vladimir Putin’s c— holster”

Colbert responded to criticism (#FireColbert trended on Twitter) Wednesday night with a qualified apology.