Sen. Ron Wyden revealed in a letter that major U.S. cellphone carriers like AT&T, T-Mobile, and Verizon didn't notify Senators about government surveillance requests as required.
An investigation found that the companies were not informing Senators about legal requests to surveil their phones, including those from the White House. They have since started providing such notice.
Wyden's letter highlighted the threat of executive branch surveillance on the Senate's independence and separation of powers. Some companies like Google Fi, US Mobile, and Cape now notify customers about government requests.
The Senate Sergeant at Arms updated contracts to require carriers to send notifications of surveillance requests, which were not happening before. Wyden advised colleagues to switch to carriers providing such notifications.