Democratic presidential contenders demand action on guns

Democratic presidential contenders on Saturday urged Congress to take action to curb gun violence following mass shootings last weekend in Texas and Ohio that left 31 dead. Speaking at a hastily convened forum in Iowa, they called for the imposition of universal background checks on gun buyers, so-called "red flag" laws, and ultimately a ban on military-style assault weapons. The candidates took questions from gun-control advocates and shooting survivors at a program sponsored by Everytown for Gun Safety, an advocacy group founded by former New York Mayor Michael Bloomberg.