Julian Zelizer : Tea Party adept at `` Facebook politics , '' rallying supporters via cyberspace . Obama , Democrats had same success , but since election , Web support is down , he writes . Comment: Although O'Donnell has been omnipresent in the national media , she has been notably absent where it matters most , Delaware . Facebook politics lacks local element and commitment crucial to politics , Zelizer says .
Julian Zelizer : Tea Party adept at `` Facebook politics , '' rallying supporters via cyberspace . Obama , Democrats had same success , but since election , Web support is down , he writes . Comment: Facebook politics lacks local element and commitment crucial to politics , Zelizer says .