California has issued the U.S. Supreme Court a direct challenge at the confluence of gun and abortion rights as Gov. Gavin Newsom signed a firearms bill embracing the doctrine of private enforcement.

The new law allows Californians to sue manufacturers and citizens who distribute banned assault weapons or ghost guns. Newsom explicitly modeled the concept on a Texas law, preserved by the high court, that allows people to pursue legal claims against abortion providers.

By calling for and then signing the bill, Newsom has set up a legal test while illuminating the gulf between liberal California and a conservative Supreme Court on politically charged issues.