https://phys.org/news/2018-09-probe-big-tech-stifling-free.html

According to the statement, Attorney General Jeff Sessions convened a meeting of state attorneys general later this month "to discuss a growing concern that these companies may be hurting competition and intentionally stifling the free exchange of ideas on their platforms."

The suggestions of legal or regulatory action caught many tech industry observers by surprise and came as lawmakers were holding hearings on foreign influence campaigns on social media and "transparency."