The historical long-term trend does not offer encouragement. We are not good at (do not place a value on) protectionism. Automotive, shipping, gadgets ... The trend is towards globalism and worldwide markets (NAFTA ...)
Ultimately this will be decided on Capitol Hill. It could go the way of the Dubai Ports deal or it could go the way of the shipping industry. We could lobby hard like Big Farm and Big Pharma (the only two segments that seem to be successful in maintaining trade barriers) or it could go the way of, well, every other industry. I wouldn't count on public support, since US airlines rank somewhere between insurance companies and tobacco firms in public perception.
Back the PAC and write to your representatives.