HELENA, Mont. (AP) — Montana became the first state in the U.S. to enact a complete ban on TikTok on Wednesday when Republican Gov. Greg Gianforte signed a measure that's more sweeping than any other state's attempts to curtail the social media app, which is owned by a Chinese tech company. The measure, scheduled to take effect on Jan. 1, 2024, is expected to be challenged legally and will serve as a testing ground for the TikTok-free America that many national lawmakers have envisioned. Cybersecurity experts say it could be difficult to enforce the ban. “Today, Montana takes the most...