Chief executives of Apple, Amazon, Facebook and Google testified in front of a House Judiciary subcommittee on Wednesday, ostensibly about antitrust issues. It was the highest-profile showdown to date in the increasingly fraught relationship between Washington, D.C., and Silicon Valley, which could culminate in efforts to break up one, or more, of the companies.

Axios Re:Cap speaks with Rep. David Cicilline (D-R.I.), chairman of the antitrust panel, about what he learned, why he wanted the quartet to testify together, and which companies he thinks should be broken up.