The order is based on a "most favored nation" pricing model, which is similar to a policy Trump pushed in his first administration.

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

The president has long complained that the United States pays more for medicines than other wealthy countries. But he offered no clear legal authority to mandate lower prices.