Polling and Elections: Presidential Referendum Effects in the 2018 Midterm Election: An Initial Analysis

Using the recently released American National Election Studies (ANES) 2018 Pilot Study, this article tests for presidential referendum effects in House, Senate, and gubernatorial contests during that election cycle. Results find strong presidential referendum effects in spite of the considerable correlation between presidential approval and several political predispositions, notably partisan and ideological identification. Weak electoral performance of Republican candidates was due to President Donald Trump's overall low approval ratings. However, Trump approvers appeared more inclined to turn out to vote than disapprovers, which softened the negative effect of Trump's weak approval polls on Republican candidate vote totals. The conclusion discusses the potential implications of these findings for the upcoming 2020 presidential elections, especially if Trump approvers continue their turnout advantage over disapprovers.