Since President Donald Trump announced that he wanted to impose a 100 percent tariff on all movies produced outside the U.S., everyone from studio executives to Democratic lawmakers have been scrambling to find a way to stop him. But California’s top prosecutor has a novel approach — and he may be willing to act on it.

The White House says “no final decisions on foreign film tariffs have been made,” as the president pushes the idea on social media.

How will these things work? The White House has provided no details on the proposed tariffs on foreign-made movies or the plan to reopen Alcatraz as a prison.