As mass shootings, including the recent attacks on police officers, have continued to make headlines, public support for gun control has risen. Some state governments have passed tougher gun laws despite opposition to such measures by the National Rifle Association (NRA) and its allies in Congress. At the same time, conservative states such as Texas have enacted laws allowing licensed gun owners to carry guns in public. The gun issue has generated high-profile court cases, including one filed by parents of children killed in the 2012 Sandy Hook Elementary School shooting in Newtown, Conn. The November presidential election looms large in how the issue will be treated in the courts, as it will help determine the makeup of the Supreme Court following this year’s death of conservative Justice Antonin Scalia.