I’m sure, but it did sound like some part of the bureaucratic machinery knocked loose for his chunk coincidentally last Friday.
I study this issue in some detail - Michigan airports have also received subsidies to pay airlines to run jets on regional routes, instead of turboprops.
This money goes to the added operational cost of the jets, to save a few minutes per flight, and once the money is burned up, the flights revert to turboprops.
The whole transportation situation in Michigan has been heavily subsidized for decades - starting with trains and many millions for carferries, and then airports and back to dreams of trains again.
It’s (political) cultural - the money isn’t out of the ordinary, so I doubt it’s a bribe to Stupak.