It's time for Canadian income tax rates to match those of the U.S.

My wife and I have some long-term friends who we get along with swimmingly, but we sometimes disagree, like most friendships. We work through it maturely because we value the history and the relationship. We don’t use disagreements as an excuse to rupture something built over decades.

That’s how I feel about Canada and the United States right now. Donald Trump’s approach —...