Here are seven major questions left unanswered on Trump’s proposal: Trump only said he was “authorizing” the U.S. Trade Representative and the Commerce Department to impose a 100% tariff on foreign films. He didn’t say he would do it. With previous tariff threats, Trump has sometimes made good and sometimes backed off in the face of pressure.

A law passed by Congress in 1988 explicitly bars the president from being able to regulate the import and export of films, books and music — something TikTok recently brought up.

The Berman Amendment protects the free flow of information across borders, but it's only been applied to sanctions and embargoes.