Incoming Border Czar Tom Homan weighs in President-elect Trump's tariff threats against Mexico and Canada, the showdown with sanctuary cities and the humanitarian crisis on the border.

President-elect Donald Trump threatened to impose sweeping new tariffs on Mexico, Canada and China as soon as he takes office as part of his effort to crack down on illegal immigration and drugs. He said he would impose a 25% tax on all products entering the country from Canada and Mexico,