Legislative term limits garnered public support because they promised to drain the swamp, removing entrenched incumbents from office. There is often a partisan dimension to this appeal since “the swamp” that is to be “drained” has often been controlled by one party for a lengthy period. However, it remains unclear to what extent term limits realign partisanship within US state legislatures. Using newly available turnover data, this research evaluates how legislative partisanship shifted after the implementation of term limits in state legislatures and continued over 20 years. The initial surge effects of term limits did appear to level the playing field between parties. The passage of term limits reversed party majorities in state legislatures, primarily benefiting newfound Republican majorities. These findings have important implications for current understandings of legislative term limits, as more states revisit these proposals, and provide insight into party trends at the state legislative level.