"OK" is actually a very relative term, here.
Would it be ok for the U.S. government to strong-arm Northwest out of buying Airbus planes? Absolutely not. They're a viable, strong company in a free-market economy and can do what they want.
What about USAirways, when they're desperate to get government-backed loans? Perhaps it's ok (if they needed mainline jets) to push for a Boeing order over an Airbus order, seeing as they're seeking loan guarantees, and that such an order would result in more jobs for American citizens (at both Boeing AND USAirways), and in more taxes for the government. There would definitely be an air of nationalism behind it, though.
How about a totally government-subsidized carrier, like Air France? (They're still gov't owned, if memory serves) It would definitely be appropriate for the French government to try and swing an Airbus deal over Boeing...but again, "Nationalism!" would be the cry.
So is it ok to bring politics into the equation? Yes. No. Maybe. It depends. THERE'S your answer.
"In this present crisis, government is not the solution to our problem - government IS the problem." - Ronald Reagan
Comments made here are my own and are not intended to represent the official position of Alaska Air Group