A U.S. plan to slap tariffs on countries buying sanctioned Venezuelan oil marks an unprecedented, and potentially potent, mixture of punitive economic measures against a geopolitical foe that Washington could replicate against other countries like Russia and Iran,

President Trump on Monday said the U.S. will impose a 25% tariff on imports from countries that purchase oil or gasoline from Venezuela.

After setting April 2 as the day that tariffs on most global goods will go into effect, the White House appears to be walking back its plans. Levies on