Mexico just didn't see it coming. The free-trade backlash and anti-Mexican rhetoric that helped fuel Donald Trump's rise came as a surprise to officials and executives in the U.S.'s southern neighbor. Now they are scrambling to save not just NAFTA, but an entire economic model based around global supply chains and ever closer ties with the U.S. Thrown into the mix are elections in Mexico that could propel their own populists into the presidency and congress. Shannon O'Neil from the Council on Foreign Relations explains the stakes to Dan and Scott. Intriguing footnote: Maybe the NAFTA debate is really about China.