Representatives of two counties in far Northern California petitioned state officials Thursday for the right to form a 51st state called Jefferson, formally asking state lawmakers to vote on their proposal. Modoc and Siskiyou counties, which share a border with Oregon and have a combined population of about 53,000, submitted petitions from their county governments to the secretaries of the state Assembly and Senate after filing a petition complaining about a lack of representation to the secretary of state. "