TikTok Sues Montana Over State’s Ban of Its Service

TikTok is suing Montana over the state’s new ban of the social-media platform, challenging the law’s constitutionality.

The suit, filed Monday in the U.S. District Court of Montana, alleges the ban violates the First Amendment and several other laws. The case was brought against the state’s attorney general, who is tasked with enforcing the ban.

The ban is scheduled to go into effect Jan. 1. It is unclear how it will be enforced.

“We are challenging Montana’s unconstitutional TikTok ban to protect our business and the hundreds of thousands of...