Pat Buchanan is an arch-right political commentator and three-time presidential candidate who is considered well to the right of the Republican Party. He opposes NAFTA. Ralph Nader is a political activist and perennial presidential candidate who is considered well to the left of the Democratic Party. He also opposes NAFTA.
These guys don't like each other much, at least politically.
Why, then, do they agree on so important an issue? Is it for the same, or for different, reasons?