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.

If Donald Trump wanted to turn his prescription-drug executive order into policy, he could declare an emergency and order the federal government — through Medicare, Medicaid and the Department of Veterans Affairs — to start buying all the prescription drugs in France and Japan.

Countries with universal healthcare systems have stronger bargaining power, which has allowed them to effectively negotiate lower drug prices.