His own worst enemy: Even as the economy makes the best case for Trump’s re-election, he undermines it at every step

With 164,000 jobs created in July and the unemployment rate sticking at rock-bottom 3.7%, the American economy appears to be chugging along. For that, President Trump deserves credit.

But there are grains of sand in the engine’s gears, and it’s Trump who put them there.

For starters, note this...