In a letter to the CEOs of Facebook, Google, Microsoft and Apple, Brendan Carr, President-elect Donald Trump’s pick for chairman of the Federal Communications Commission (FCC), accused the tech giants of “improper conduct” and participating in a “censorship cartel” that has “silenced Americans.”

The four-page letter, sent Nov. 13, also addressed the companies’ dealings with “fact-checking” firm NewsGuard — the subject of a congressional investigation over “censorship concerns” and its ties to the Biden administration.