Colorado's state of Jefferson movement?

From CBS Denver:

There’s a growing effort to create a 51st state out of parts of northeast Colorado.

Ten counties, including Weld and Morgan, started talking about seceding last month. Now some people Lincoln and Cheyenne counties say they want to join a new state they’d call “North Colorado.”

Organizers of the secession effort say their interests are not being represented at the state Capitol.

Sounds vaguely familiar.