Advocacy, Interpretation, and Influence in the U.S. Congress

This article examines the relationship between two variables: interpretations by members of Congress of the consequences of legislative proposals and the influence of those who advocate particular actions on the proposals. The article investigates how the legislative decisions of members depend on interpretations, how the arguments of advocates shape interpretations, and how the influence on interpretations translates into influence over patterns of congressional support expressed for a legislative proposal. The major thesis is that member interpretations and hence legislative influence are unstable, a result of basic features of human decision making in the congressional context. As a result, advocates are hypothesized to have considerable influence in maintaining and expanding the size of their congressional coalitions in some legislative situations, but not others. In particular, when faced with weakening amendments or motions, advocates are unable to prevent defections among their supporters. Evidence of the legislative influence of the National Education Association during the Ninety-fourth Congress is found to be consistent with these hypotheses.