A Republican bill introduced Thursday takes aim at Canada’s Online Streaming Act and threatens retaliatory measures for the “discriminatory” policy, including additional tariffs and even changes to the North American free trade agreement.

The legislation from U.S. Rep. Lloyd Smucker of Pennsylvania would launch a U.S. Trade Representative investigation into whether the Canadian law unfairly burdens American commerce.

If that conclusion is reached, the bill orders “necessary retaliatory action” such as tariffs or “the suspension, withdrawal, or modification of trade agreement concessions or benefits to Canada under the United States-Mexico-Canada Agreement,” referred to in Canada as CUSMA.