Presidential Coattails in Senate Elections

Despite the diminished importance of partisanship, greater split-ticket voting, and a growth in Senate campaign spending, a party's presidential vote in the states remains positively related to its Senate vote in recent elections. We investigate to what extent presidential coattails are responsible for this association. State election returns for Senate and presidential contests are examined in presidential election years from 1972 to 1988. The analysis indicates that (1) presidential coattails exert a modest but significant influence on the Senate vote, probably affecting the election outcomes in twelve cases, and (2) partisanship remains a significant linkage between presidential and Senate elections.