it's about NYC.
it's about LGA.
US, now a tiny insignificant subsidiary of AA, operates a competitive Shuttle from LGA.
The US Shuttle incidentally operates from DL's terminals which means that unless you have evidence otherwise, AA cannot move the US operation into the same terminal as AA's other flights.
DL's advantage in the Shuttle markets will grow as DL offers more connections at LGA than AA or US can which will make the Shuttle no different from other markets at LGA where DL has used the hub to help increase schedules and win a greater share of the local market.
It is E's obvious desire that DL will be forced to accommodate AA's need to consolidate its operations.
If AA has enough money or willingness to provide what DL needs, it might be considered.
For now, DL is moving forward with its plans to further strengthen the NYC market, this time with a focus on the Shuttle.
sorry if that is not the narrative you want to read.