Wednesday’s mass shooting at a Florida high school has most of Montana’s congressional delegation and 2018 federal candidates speaking about mental health reform, but few supporting any kind of gun control. The 19-year-old Florida gunman– with a legally purchased semiautomatic assault rifle– killed 17 people Wednesday at a Broward County high school. President Donald Trump signed a bill revoking Obama-era mental health restrictions on gun purchases in January 2017.