Abstract
State governments in the U.S. exercise broad authority over elections and maintain a diverse set of rules regulating the process of registering to vote, casting ballots, and drawing congressional district lines, and even determining in some respects who is eligible to vote. In this contribution, I highlight the significant discretion that states exercise in making election rules and the range of rules in effect in the 50 states. I also take note of several ways that the scope of state authority is subject to modification by the Supreme Court and Congress, focusing on some recent and pending Supreme Court cases and congressional acts with the potential to broaden or constrain state authority.