Top Candidates Don't Drag Down House Races — Except When Local News Fades

📊 What Was Compared

This study examines whether the quality and ideology of top-of-the-ticket candidates in gubernatorial and U.S. Senate races affect co-partisan vote shares in down-ballot U.S. House contests. The question addresses a widespread belief among campaign staff, journalists, and political scientists that weak or extreme top-ticket candidates harm their party’s lower-ballot performance.

🧭 How the Patterns Were Measured

• Analysis focuses on top-of-the-ticket quality and ideology in gubernatorial and Senate races and co-partisan vote shares in House races.
• Comparisons include naive models that treat top-ticket traits as independent influences and models that account for correlations in candidate quality and ideology across offices.
• The design isolates statewide top-of-the-ticket effects from broader patterns of candidate sorting across offices.

🔎 Key Findings

• Naive estimates suggest that top-of-the-ticket candidates influence down-ballot outcomes.
• After accounting for correlations in candidate quality and ideology across offices, estimated statewide top-of-the-ticket effects are near-zero.
• Voters demonstrate a strong capacity to detect differences in candidate quality and ideology across offices and to incorporate that information into their choices for House races.
• That voter capacity has weakened considerably in recent years, consistent with concerns about declining access to local news and information.

⚖️ Why This Matters

These results challenge canonical beliefs that weak or extreme top-ticket candidates systematically drag down down-ballot co-partisans across a state. Instead, the findings point to voter discernment as a moderating force—one that is becoming less reliable as the contemporary information environment deteriorates. This revision has implications for campaign strategy, theories of ticket effects, and research on how local news ecosystems shape voter competence.