OPINION: Steve Hilton: Trump proves that tariffs work. Here are the lessons we should learn

Last week we saw proof that tariffs work. President Trump threatened tariffs on Mexico. Their leaders came to negoitiate, and we got concrete results.

Even the Wall Street Journal, whose generally indispensable and brilliant editorial pages regularly rail against tariffs, recognized the president's achievement, writing the following:

"In the course of a week, Mr. Trump managed to get Mexico to agree to two things that months ago would have seemed unlikely: Militarizing Mexico’s crackdown on migrants by deploying National Guard troops and expanding the ‘remain in Mexico’ plan for asylum...