President Donald Trump signed a sweeping executive order Monday morning that promises to crack down on “unreasonable or discriminatory” practices by foreign countries that result in Americans paying far higher costs for prescription drugs.

U.S. President Donald Trump signed an executive order on Monday to reduce drug prices in the United States by between 30% and 80% with the aim of equalizing global prices.

President Donald Trump announced that his administration would tackle rising drug costs in the United States by establishing “most favored nation” pricing, which would base the U.S. prices of pharmaceuticals on the lowest prices paid by other foreign nations.