evidence: As Ronald Reagan once said, if mandatory background checks could save more lives, "it would be well worth making it the law of the land." The bill before Congress three years ago met that test. Unfortunately, too many senators failed theirs. (Applause.) In fact, we know that background checks make a difference. After Connecticut passed a law requiring background checks and gun safety courses, gun deaths decreased by 40 percent -- 40 percent. (Applause.) Meanwhile, since Missouri repealed a law requiring comprehensive background checks and purchase permits, gun deaths have increased to almost 50 percent higher than the national average. One study found, unsurprisingly, that criminals in Missouri now have easier access to guns. [...] It’s also why we’re going to ensure that federal mental health records are submitted to the background check system, and remove barriers that prevent states from reporting relevant information. If we can continue to de-stigmatize mental health issues, get folks proper care, and fill gaps in the background check system, then we can spare more families the pain of losing a loved one to suicide.