"The institutions will constrain Trump" has much the same ring as "He'll never win the nomination" and "He'll never win the election."

Yet here he is, threatening the people who staff those institutions.  Or whom did you think he meant by that "small group" that's been enriching themselves at the forgotten people's expense?

As head of government, Trump now commands the Homeland Security apparatus, 240,000 men and women with badges and guns and Patriot Act authority.