WASHINGTON — The Supreme Court on Thursday barred the government from restricting the gun rights of casual drug users in a case involving a Texas man who occasionally consumed marijuana. On a 9-0 vote, the court concluded that the government’s invocation of the law fell afoul of the Constitution's Second Amendment when it was used against Ali Danial Hemani. The law makes it a crime for any person who is “an unlawful user of or addicted to any controlled substance” to possess a firearm. It is