Patching up the parties
Despite early bickering, Democrats and Republicans will rally around their candidates on election day.
By John Sides
May 25, 2008
Pundits seem to be converging on a new conventional wisdom: that the drawn-out and extraordinarily competitive Democratic presidential primary race between Barack Obama and Hillary Rodham Clinton has cleaved the party in two.Many voters insist that they will not support any Democratic candidate in the general election except their original favorite, according to exit polls, and that has caused party elders to fret about whether the eventual nominee will be able to unify the party and defeat presumptive GOP nominee John McCain.
McCain may also have problems unifying his party in the fall, especially attracting conservative Republicans.In some recent primaries, as many as a quarter of Republican voters supported Mike Huckabee, who quit the race in March, or Ron Paul, who has stopped campaigning. GOP leaders worry that these voters might not turn out for the more moderate McCain.
Both parties can rest easy. Despite ugly battles and policy differences that sometimes seem intractable, the reality is that presidential campaigns tend to unify each party behind its nominee. Political scientists call this phenomenon the "reinforcement effect." It was described in 1940 in the first major study of a presidential campaign. The study's authors -- Paul Lazarsfeld, Bernard Berelson and Hazel Gaudet -- noted that voters tended to "join the fold to which they belong," with Democrats gravitating to Franklin D. Roosevelt and Republicans to Wendell Willkie. These voters were not blindly following whichever shepherds their parties nominated, the study concluded. Rather, their partisan loyalties reflected their underlying values, and the parties' nominees solidified their support by emphasizing these same values as the campaign unfolded.
The same thing happened in the 2000 presidential campaign, in which both Al Gore and George W. Bush emerged from contested primaries to be their parties' nominees. Early on, Democrats and Republicans appeared less than fully enthusiastic about their candidates. For instance, in June 2000, only 71% of likely Democratic voters said they would vote for Gore in the general election, according to the National Annenberg Election Study, a survey conducted by the Annenberg Public Policy Center at the University of Pennsylvania. The rest said they would either vote for Bush or another candidate, or were undecided. Among Republicans, only 82% said they planned to vote for Bush. But voters in both parties overcame or set aside their early doubts as the campaign unfolded. According to the Voter News Service's election-day exit poll, 86% of Democrats voted for Gore and 91% of Republicans for Bush. Most partisans rejoined the fold.
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