Wsj Opinion: Potomac Watch

After Ontario releases an ad featuring Ronald Reagan touting free trade over tariffs, Donald Trump increases the tariffs on Canada to 10% in response. Is Trump right about Reagan? Plus, President Javier Milei wins in Argentina on a mandate of free-market reforms, and President Trump heads to Asia as the U.S. and China reach a trade truce.   Learn more about your ad choices. Visit megaphone.fm/adchoices