Congress blocks rule barring mentally impaired from guns

The Republican-led Senate voted Wednesday to block an Obama-era regulation that would prevent an estimated 75,000 people with mental disorders from being able to purchase a firearm. The measure now goes to President Donald Trump, who is expected to sign it.The regulation was crafted as part of President Barack Obama's efforts to strengthen the federal background check system in the wake of the 2012 massacre of 20 young students and six staff at Sandy Hook Elementary School in Newtown, Connecticu