One who takes part or sides with another; an adherent or supporter of a party, person, or cause.
Looks like Calkins (pictured below) is striking out as a supporter of the "Common Good" in the Monterey Bay Region.
Like I say, a piece of good news!
(1) - http://royalcalkins.wordpress.com/2014/06/26/a-ramble-in-the-bramble/
(2) - http://royalcalkins.wordpress.com/about/