It wouldn't be a Pennsylvania senator, but it would be a group from Connecticut, Delaware, Hawaii, Idaho, Maine, Massachusetts, Montana, Nevada, New Hampshire, New Mexico, New York, North Dakota, Rhode Island, South Dakota, Vermont, and Wyoming.
But I agree with you on the most likely outcome. I just don't see the P5 ever totally severing the path a G5 has to a national title. I think, at the least, any public institution receiving governmental aid that wants to compete at the highest level will be able to do so.