Sens. Elizabeth Warren, Ron Wyden, Ed Markey, and Mazie Hirono sent a letter to top officials at Twitter expressing their concerns over the platform's privacy policy.
Hunter Biden offered to testify publicly before Congress, striking a defiant note in response to a subpoena from Republicans and setting up a potential high-stakes face-off even as a separate special counsel probe unfolds and his father, President Joe Biden, campaigns for reelection.