The defining moment in American economic history is when Bill Clinton lobbied to get China into the World Trade Organization. It was the worst political and economic mistake in American history in the last 100 years.

Donald Trump is not a protectionist. If he imposes tariffs on China or any other country that cheats, all he wants to do is defend America against unfair trade practices.

In my movie, "Death By China," it shows Bill Clinton in 2000 promising that when China got into the World Trade Organization we would be making products here and selling them there, and life would be great. Just the opposite has happened. And here's why this has been so devastating - China went into the World Trade Organization and agreed to play by certain rules. Instead, it's violated these rules. For 15 years, it continues to illegally subsidize its exports.

If you've been to China, you know there are over 100 cities in China, and the pollution levels are just horrific - 60,000 people a year die in Chinese factories and facilities, because they don't have any safety regulations. It's a carnage; it's Dickensian.

From 1947 to 2001, the American economy grew annually at a rate of 3.5 percent. After China got into the World Trade Organization, got access to our markets and flooded our markets with its illegally subsidized exports, we grew at a rate of 1.8 percent from 2002 to 2015. That's almost cut in half.

We're going right down the toilet, and it's a made-in-China toilet. I teach MBAs. And I noticed, starting a few years after China joined the World Trade Organization, that a lot of my students were no longer employed. They were still coming to get their MBA, but they'd lost their jobs.

Donald Trump understands China influence. He's been talking about it since 1980. He understands it. The people that are on the other side of this, including his opponent, Hillary Clinton, have been part of every bad trade negotiation we've had since 1993.