Hostile news perceptions, perceived media influence, and behavioral outcomes among Republicans and Democrats were examined before and after the 2004 U.S. presidential election. Predictions were grounded in social identity/self-categorization theories, and influence of presumed influence. Hostile news perceptions were greater among Republicans, especially Fox News viewers. Third-person perceptions (TPPs) for ingroup and outgroup (own party, other party) varied based on media message (debates, news, spin, polls, comedy) and party affiliation. TPPs were larger for the outgroup than the ingroup, but only for Republicans. Following the election, changes in media perceptions were related to the election outcome and interpersonal discussion. Greater perceived influence on outgroup voters was associated with stronger support for censorship, and a lower voting likelihood among Democrats.