Jefferson — The Fifty-First State of the United States of America?

A collection of counties from northern California and southern Oregon are rallying together to form their own state, which they have already named Jefferson.  As more people are jumping on board, the movement for a fifty-first state is the strongest in a long time.  Will Jefferson successfully leave California and Oregon behind?  And will the federal government tolerate such a move?  Could this be a preview of the splintering of the United States as the country becomes more bitterly divided than at any time after the Civil War?