The U.S. Supreme Court voted 7 to 2 to uphold a Biden-era regulation that requires ghost guns to have serial numbers, be sold by licensed vendors, and for buyers to undergo a background check. Ghost guns are assembled by users from DIY kits that are typically sold online and had previously been untrackable.

In other Supreme Court news, the Trump administration has filed an emergency application seeking to cancel $65 million in congressionally appropriated teacher-training grants it says will be used for diversity, equity and inclusion initiatives.