Actually that's an incorrect statement and assumption. ALPA is an association, made up of not just national, but the Master Executive Councils and Local Executive Councils, along with the individual committees representing the different areas encompassed by the union (aeromedical, safety, contract enforcement, etc.). The point is, although ALPA national is a political entity that represents the organization as a whole, it is the individual MECs, LECs, and respective negotiating committees that negotiate on behalf of their particular pilot group at each airline, not national. If you were familiar with the ALPA bylaws you would also know that any agenda brought forward by national has to be voted on and approved at the MEC and LEC level at the very least. So again, I recommend doing some reading, Flying the Line I and II are a great start. I believe you're basing your assumption in that many airlines both major and regional are represented by ALPA, but again, you have to understand the infrastructure, to know that such statement is simply not true.