The House passed legislation Friday to revive a ban on certain semi-automatic guns, the first vote of its kind in years and a direct response to the firearms often used in the crush of mass shootings ripping through communities nationwide. Once banned in the U.S., the high-powered firearms are now widely blamed as the weapon of choice among young men responsible for many of the most devastating mass shootings. But Congress allowed the restrictions first put in place in 1994 on the manufacture and sales of the weapons to expire a decade later, unable to muster the political support to...