Social divisions between American partisans are growing, with Republicans and Democrats exhibiting partisan homophily in a range of seemingly non-political domains. It has been widely claimed that this partisan social divide extends to Americans' decisions about where to live. In two original survey experiments, we show that Democrats are, indeed, more likely than Republicans to prefer living in dense, racially diverse, more Democratic places. Improving on previous studies, we test respondents' stated preferences against their actual moving behavior, showing that even as partisans differ in their residential preferences in ways that should lead to sorting, on average they are not migrating to more politically different zip codes. Using zip-code-level Census and partisanship data on the places where respondents live, we provide a likely explanation for this null effect: by prioritizing common concerns when deciding where to live, Americans forgo the opportunity to move to more politically compatible communities.