WASHINGTON—A U.S. appeals court refused to halt President Donald Trump’s ban on “bump stocks”—rapid-fire gun attachments used in the deadliest mass shooting in modern U.S. history—in the latest courtroom defeat for firearms rights advocates who oppose the policy.
The U.S. Court of Appeals for the District of Columbia Circuit on April 1 upheld a lower court ruling that denied a request by opponents of the policy for a preliminary injunction lifting the ban, which took effect last week. The U.S. Supreme Court twice last week, in cases from Michigan and Washington, rejected stay requests from gun-rights advocates.
