Generational Replacement and the Growth of Incumbent Reelection Margins in the U.S. House

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Abstract
Virtually all congressional scholars investigating the rise of incumbent safety in the U.S. House have assumed that the responsible cause, regardless of its specific nature, is one which has affected incumbents generally. The sole exception is Fiorina, who speculates that increased overall safety results from recent freshmen's greater electoral strength. The analysis performed here confirms this generational replacement hypothesis. Much greater vote gains have resulted from the freshman term of incumbency since 1966–68, while no pro-incumbent trend for veterans has surfaced.

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