Sen. Ed Markey (D-Mass.) on Sunday threatened Elon Musk to "fix" his companies "or Congress will," hours after Musk mocked the senator for demanding answers about Twitter's verification process.
Driving the news: The exchange comes days after Markey tweeted to Musk, attaching a letter, demanding Twitter to explain how a Washington Post reporter was able to successfully set up a verified account impersonating the senator.