If the President wants to use an arms build-up to advance arms control, he should take his cues from the Reagan record.

President Trump is loving his trade wars. He hits Iran with sanctions, and European companies as well as American ones obediently cut ties with the country. He goes toe-to-toe with China, and the Chi…

Improbably, the Federal Reserve is surviving the Trump era with its integrity intact. Jerome H. Powell, the Fed chairman since February, is quietly emerging as a skilled Washington operator.

China has 800 million Internet users and is overtaking the United States in areas such as drones, mobile payments, bike sharing and artificial intelligence. But Trump is responding to the China chall…