Who benefits from voter identification laws?

Area of Science:

• Political Science
• Electoral Studies
• Public Policy

Background:

• Many US states enacted voter identification (ID) laws in the early 21st century, intensifying debate on election security versus access.
• Proponents claim these laws prevent voter fraud, while opponents argue they disproportionately burden minority and low-income voters, potentially impacting electoral strategies.

Purpose of the Study:

• To investigate the electoral impact of voter ID laws on Republican and Democratic candidates.
• To determine if voter ID laws provide observable electoral benefits or penalties for either major political party.

Main Methods:

• Analysis of state and federal election data from 2003 to 2020.
• Examination of electoral fortunes in state legislative, gubernatorial, congressional, and presidential races.

Main Results:

• Voter ID laws showed negligible average effects on electoral outcomes across the study period.
• Initial implementation of voter ID laws correlated with a Democratic advantage, which diminished to near zero after 2012.
• Heterogeneity in effects was observed over time, suggesting evolving impacts.

Conclusions:

• Voter ID laws do not significantly alter overall election results in the long term.
• The laws appear to motivate and mobilize supporters of both Democratic and Republican parties, thus mitigating their intended or feared electoral consequences.