European governments are examining whether U.S. President Donald Trump can force them to pay more for prescription medicines, after he issued an executive order to lower U.S. drug prices, roiling the global pharmaceutical industry.

President Trump will hold a press conference Monday morning with Health and Human Services Secretary Robert F. Kennedy Jr. to announce an executive order to cap prescription drug and pharmaceutical prices at the lowest cost offered in any other country.

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