Here's the question, why wouldn't it be more cost effective to bring all of DCI under the umbrella of 1 single regional carrier completely dedicated to Delta Air lines and not United, themselves, USAir or Continental? 1 contract, completely controlled by Delta with fleet rearrangement and shrinkage as Delta immediately see's fit to meet their needs.
Or do we have 8 DCI carriers, really fewer, but according to ALPA's lawyers 8 completely separate individual airlines, because their purpose is to...
each other?
And therein as a group the purpose of their existence is to...
us?
But oddly enough we're brought together under 1 common roof and surprisingly it's not that of Delta Air Lines
(as their allegiances are as far from Delta as ours is centered upon Delta) but rather:

National
The place that promises to protect our jobs... and theirs? But as its constituted right now, by taking all comers neither their jobs nor ours are protected, they're just shuffled periodically.