The parents of a Guilford teen who accidentally shot and killed himself at a friend’s house are hoping the new Democratic-controlled Congress will pass a federal gun safety law. The law would be modeled on one already passed in Connecticut, requiring gun owners to store their firearms in secure containers to prevent children from harming themselves. All seven Connecticut Democrats in Congress joined Michael and Kristin Song on Wednesday to announce a new push to win federal approval of “Ethan’s Law,” named after their son who died three years ago.