While the concept of the mythical State of Jefferson is popular with some today, a similar separation effort in the 1800’s had more nefarious goals.
In about 1860, Sen. Gwin of California and Gen. Joseph Lane of Oregon proposed a separate, slave-holding country called the Pacific Republic, with slaves from China, Hawaii, Africa and the South Seas.
The editor of the Table Rock Sentinel, William T’Vault, was a friend of Lane and supported the movement.
With the United States facing civil war, Lane returned to Oregon after losing election as vice president. He brought three boxes of rifles with him to deliver to T’Vault and others in Jacksonville who supported a violent uprising.
Returning to Jacksonville, he was accidentally shot by his driver near Yoncalla. They stopped for treatment at Jesse Applegate’s home, where Applegate talked Lane out of his proposed treasonous act.
Capt. J. M. Keeler and detectives came to Oregon to track the secessionist movement, and Fort Baker was established near Phoenix, Ore. Although Lane retired from public life, T’Vault continued supporting the Confederacy and slavery as editor of the Oregon Intelligencer newspaper.
Source: Lewis, Raymond. "Wiliam G. T’Vault: The opportunist, part 2." Table Rock Sentinel May 1985, vol. 5, no. 5 ed.: 2+. Print.
These popular myths about Joseph Lane, originally published by his political enemies and repeated endlessly ever since, are contradicted by the facts. See:
http://id.mind.net/~truwe/tina/homejolane.html