Partisan Strategy and the Adoption of Same-Day Registration in the American States

Abstract This study seeks to explain state adoptions of same-day registration (SDR), with a focus on determining whether the Democratic (Republican) Party’s support of (resistance to) this impactful voting reform is driven by strategic electoral considerations. I find that states have an increased probability of enacting the reform when legislative Democrats are in the precarious position that comes with having just experienced minority status in one or both chambers. Relatedly, I demonstrate that the presence of a Republican legislature does not make adoption less likely until the size of the Black population reaches a certain threshold. In fact, provided the Black population is small enough, Republican control of the legislature encourages reform. The results offer conflicting evidence, however, that large Latino populations deter the GOP from establishing SDR. Considered together, the results cast doubt on the claim that either party’s position is informed by principle alone.