The Carolinian was supported by previous state government. NC now has a new Republican governor and state legislature with a Tea party contingent. I don't think they will end support for the Piedmont, the Carolinian, or the current Piedmont corridor improvement projects, but I suspect there will be weak support in the next several years for anything more than that.The Carolinian is enthusiastically (in comparison) supported by the state, and in terms of its future, they're talking about adding freqeuncies, making it faster and doing other pleasant things to it.In the case of the Pennsylavnian, the prospects look very much to be heading in the opposite direction.
In the case of PA, if Ed Rendell was still Governor, the question of state subsidy for the Pennsylvanian would not be an issue. It would be a matter of how to fund it and the additional costs for the Keystones, not whether to do so. PA has been facing serious shortfalls in transportation funding for road, highway, repairing crumbling bridges, transit for years. If the state can finally address the revenue problem by raising the gas tax, albeit indirectly, then the question of the subsidy for the Pennsylvanian and Keystone is likely to be resolved. I think, after some political theater, that PennDOT will come through and provide the full subsidy needed to maintain the current level of service.