Our article investigates the role of congressional candidates during the era of party ballots in nineteenth-century congressional elections. We examine how these candidates contributed to the overall quality of the party ballot and the means by which nationalization of elections served to mitigate candidate attributes. In our analysis, we take advantage of two unique features of elections during this era. First, election timing was quite variable before 1872, as many House races were not held concurrently with presidential elections. Second, House candidates' position on the ballot varied depending on whether a presidential or gubernatorial race was also being contested at the same time. To investigate these factors, we examine House elections prior to the adoption of the Australian ballot and find strong evidence of candidate effects during this period. Our findings raise important implications about candidate influence and electoral accountability in a more party-centered era.S tudents of congressional politics generally agree that the adoption of the secret ballot in the late nineteenth century was instrumental in the rise of candidatecentered politics. With the elimination of the party ballot that had been in use for several decades, voters could more easily reward or punish individual elected officials or split their ticket since all candidates were listed on the same ballot (Katz and Sala 1996;Rusk 1970). Nevertheless, recent evidence suggests that the quality of individual candidates affected elections in earlier eras (Carson and Hood 2014; Carson and Roberts 2013). When coupled with growing evidence of an electoral connection in the nineteenth century (Bianco, Spence, and Wilkerson 1996;Carson and Engstrom 2005;Carson and Jenkins 2011;Finocchiaro and Jenkins 2016;Rogowski and Gibson 2015), these phenomena raise a variety of implications for existing accounts of electoral politics across time.Our article examines the role of congressional candidates in the era of party ballots. We investigate how congressional candidates contributed to the overall quality of the party ballot and how the nationalization of elections affected the role of candidate attributes. First, the collective nature of the party ballot meant that both parties and candidates had an interest in constructing the best party ticket they could (Carson and Roberts 2013). As such, congressional candidates who could help attract voters or even mobilize supporters had the potential to produce positive electoral returns for the party even if voters were not voting for them directly. Second, both nonuniform election dates and midterm elections should condition the influence of national politics on congressional elections. In effect, the quality of individual congressional candidates should matter significantly more in these cases since voters were not simply making a choice based on which presidential candidate was at the top of the ticket. To examine each of these factors more systematically, we analyze House elections from five decades of the nin...