Trump’s Campaign Pledges Are on a Collision Course with Reality

Economic reality catches up with every president, and Donald Trump is no exception. His Mar-a-Lago entourage and perhaps the president-elect are already learning that what’s promised either cannot be fulfilled or would be terrible if it was. So now they’re backpedaling on his three central campaign commitments.

Trump’s number one pledge was to round up, detain, and deport 11 million or more immigrants. Promises were easy as the Republican nominee, but as president, Trump would have to...