U.S. exported $266 billion in goods to Canada last year.
U.S. exported $262 billion in goods to Mexico last year.
If Trump's opening tough-guy position is "major cuts to  imports from Canada and Mexico,"  then our negotiators should respond in kind, threatening the half trillion  each year the U.S. exports to Canada and Mexico, thus putting hundreds of thousands of U.S. jobs at risk.
This is the only language Mr.  Bombast responds to. The language of casinos and NY real estate--kill or be killed.
He has proven to be a paper tiger, but he has to be confronted.