DL also had a hub in Kentucky (CVG involves double political points since it is physically in KY but primarily serves OH).
Note that even in the executive dining room, DL was facing pressure from Sen. on both sides of the aisle.
That is business and doing what is in the company's best interest is what is most important. Politicians are well aware that no company is going to make a decision that is counter to their own interests even if is counter to those of one party or another.
Thus, Ted Reed's piece tries to throw Tea Party politics into the discussion about ExIm. Which side of the aisle cares about ExIm should matter less than this statement:
In an Aug. 21 letter to Rep. Jeb Hensarling, chairman of the Committee on Financial Services, which is considering the Ex-Im Bank's charter renewal, Delta lobbyist Andrea Fischer Newman (note: she is actually a DL employee, not a lobbyist) wrote that "when our government backs our competitors, it tells our employees that their jobs don't matter."
Ted Reed gets this part right
"But to say that the bank does important work is not to say that it should support one industry at the expense of another."