How Trump’s dizzying jerks and jolts on tariffs are ‘freezing’ US business

News Snapshot:

Donald Trump declared there to be “no room left” for a deal with Canada and Mexico this week, launching a trade war against his nation’s closest allies that he presented as an effort to protect America’s soul. Then he pulled back. It wasn’t his first feint and retreat. It probably won’t be the last. A day after imposing steep tariffs on his country’s neighbors, the US president announced a month-long reprieve for carmakers. The following day, tariffs were also suspended on almost all goods from Canada and Mexico. Tariffs on China, levied at a 10% rate in February and doubled...