Which supreme court decision was the first time since the new deal that the court limited the power of congress under the commerce clause? loving v. virginia printz v. united states king v. burwell united states v. lopez?

The answer is  united states v. lopez. It was the primary United States Supreme Court case since the New Deal as far as possible to Congress' energy under the Commerce Clause of the United States Constitution. The Supreme Court held that the government Gun-Free School Zones Act of 1990, which prohibited ownership of handguns close schools, was illegal in light of the fact that it didn't substantially affect interstate trade.