More than a dozen states and the District of Columbia filed lawsuits against TikTok on Tuesday, alleging the popular short-form video app is damaging children’s mental health with a product designed to be used compulsively and excessively. The lawsuits stem from a national investigation into TikTok, which was launched in March 2022 by a bipartisan coalition of attorneys general from several states, including California, Kentucky and New Jersey. All of the complaints were filed in...