If you think the Trump campaign is full of amateurs, you are correct. Donald Trump’s social media director Dan Scavino, eager to prove that his boss was an expert on tax reform, posted a link to an appearance Trump made in 1991 before the House Budget Committee: There’s one problem: in his testimony, not only did Trump bash Ronald Reagan’s Tax Reform Act of 1986, calling it a catastrophe and saying income taxes should be raised to increase investment in real estate, but Trump actually compared the United States to the Soviet Union. Why, you’d almost think Trump is a...