Jordan pointed to the European Union's Digital Services Act, a similar set of laws in the U.K., called the Online Services Act, and regulations around illegal content and hate speech in Brazil and Australia.
The committee is seeking communications around the companies' compliance with "foreign censorship laws, regulations, judicial orders or other government-initiated efforts" and any internal correspondence discussing those matters.
The subpoenas come after the Federal Trade Commission last week launched an inquiry into "tech censorship." FTC Chair Andrew Ferguson said in a statement that the probe will help the agency "better understand how these firms may have violated the law by silencing and intimidating Americans for speaking their minds."