Think about it - who's left? All the old establishment types have either retired from or been diselected from the Senate. McCain lost and won't be running again. There's really no "names" in the Senate who can be put up by the Washington establishment to run. You think anybody is seriously looking at Mitch McConnell for President?
You are right when I think about it.
Before I checked, I thought that Elizabeth Dole might have been young enough for another round, but she's not -- and even she just got tossed out of her Senate seat by a Democratic newcomer.