How much is too much? Media attention and popular support for an insurgent party

It is commonly observed that parties and candidates tend to receive cover-age in the news media and attention in proportion to their electoral support. Although this norm serves to ensure that coverage is balanced or fair, news values often produce a different pattern of coverage in the television news media. This article considers the dynamic relationship between coverage in the news media and popular support for an insurgent party-the Reform party-in the 1993 Canadian election campaign. The analysis shows that coverage of Reform in the news media underwent an important change during the campaign that appears to have occurred before any change in popular support. While this change in attention to Reform was critical for Reform's ability to mobilize its potential electoral support, it also provides empirical support for the argument that there is an underlying equilibrium between the amount of coverage a party receives and its political support. Data for this analysis come from a campaign wave survey of vote intentions as part of the 1993 Canadian Election Study and a television content analysis of campaign news. The analysis applies an error-correction approach, which assumes an underlying equilibrium relationship, to model media access and vote intentions. The article thus expands the current applications of the error-correction technique while offering substantively important evidence of the political impacts of media decisions for the electoral support of new parties.