"The Senate Democratic leadership just threatened Disney's broadcast license."
ABC has no broadcast license to threaten. No network requires a license. Only individual TV stations require licenses.
You overlook their ten owned & operated stations, listed here.
For most networks, the O&O's are major profit producers.
As a matter of fact, recall that it was a station operator -- Capital Cities Broadcasting -- that bought ABC, not the other way around.
Isn't McCain in charge of the committee that regulates broadcasting?