A bipartisan group of U.S. lawmakers has urged the U.K. Investigatory Powers Tribunal to hold an open hearing regarding Apple’s challenge to a secret legal demand from the U.K. government. Senator Ron Wyden and four others argue that the alleged order restricts Apple's constitutionally protected speech and hinders congressional oversight. Reports indicate that the U.K. government ordered Apple to create a backdoor for accessing cloud data, which Apple has resisted. Civil rights groups are also advocating for transparency in this matter as the tribunal prepares for a private hearing.