Running header: POLITICAL PUBLIC RELATIONS AND SOCIAL CAPITAL Political Public Relations in Advocacy: Building Online Influence and Social Capital Adam J. Saffer, MA University of Oklahoma Adam.Saffer@ou.edu Maureen Taylor, Ph.D. University of Oklahoma Mtaylor@ou.edu Aimei Yang, Ph.D. University of Southern California Aimei.Yang@usc.edu Article submitted to the Special Issue of Political Public Relations Public Relations Journal, April 2013