From the article:
I do not think it would be a bad idea to allow foreign carriers to own more than 25 percent of the voting shares of an airline. There are no other such laws for any other industry that I can think of.
It's true that right now, US operators are at a severe disadvantage because of the declining US dollar. Foreign currency *can* act as a hedge against rising oil prices. But economists seem to think that the other currencies will soon follow suit...