WASHINGTON (AP) — President Donald Trump has heightened tensions with China by escalating his tariffs on $200 billion in Chinese goods from 10% to 25%.

As a tool of national policy, tariffs had long been fading into history, a relic of the 19th and early 20th centuries that most experts came to see as harmful to all nations involved. Yet more than any other modern president, Trump has embraced tariffs as a punitive tool — against Europe, Canada and other key trading partners but especially against China , the second-largest economy after the U.S.

The Trump administration asserts, and many inde...