They opened the border to one of our companies at the same time we opened to theirs.Wanting the trucks fully inspected and not at just the American peoples cost is not unreasonable.
One of the ways to stop illegal immigration is to have FAIR trade with Mexico.
One thing to consider is that Canada rejects their trucks still, while the parity creates a situation where their trucks have been allowed in to the US and vice versa for nearly 11 years freely.
There is no price parity, how often do you think people in Mexico will pay twice the price to bring a US truck down there?
Economic parity is important in a "fair trade" situation.