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.

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.

The Donald Trump trade doctrine is this. America will trade with any country, so long as that deal meets these three criterion: You increase the GDP growth rate, you decrease the trade deficit, and you strengthen the manufacturing base.

The policy goal is to persuade China to stop cheating. But here's what's interesting - Donald Trump intuitively understands what things should be. I did a study in 2008 where I estimated the impact of China's unfair trade practices on their competitive advantage - the so-called China Price. You know what it came out to be? Forty-three percent. Forty-three percent - very close to what his intuition said we needed in order to equalize things.

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.

When we run these big trade deficits and send our jobs offshore, we hold our wages down and our income down. That feeds right back into the biggest part of this whole equation, consumption. This drags GDP down as well.

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.