Presidential candidates from both sides of the aisle share at least one thing in common: they all agree that China is flouting trade rules and killing American jobs. Donald Trump and Hillary Clinton, polling leaders in their respective races, have called for the U.S. to stand up to China’s unfair trade practices to protect U.S. workers. I agree and we must start now.

Thousands of U.S. aluminum workers are losing their jobs as a result of China not playing by the rules. My company, Century Aluminum, one of the largest aluminum producers in the United States, is one of the victims…