Expanding suffrage is critical for democratic inclusion. In the United States, noncitizen residents are the latest focus of such (re)enfranchising efforts. Public opinion plays a significant role in the passage of legislation expanding or restricting noncitizen access to local elections. Although elite support for noncitizen suffrage is well-documented, little is known about public opinion toward such noncitizen voter policies. What accounts for voter support for noncitizen electoral participation? We argue that the partisan alignment between noncitizens and U.S. voters shapes U.S. voters’ support for noncitizen voting rights. Evidence from two survey experiments suggests that U.S. voters are pragmatic in their enfranchising preferences: voters increase their support for co-partisan enfranchisement but oppose this same policy when considering out-partisans. These dynamics are present among both Republicans and Democrats, underscoring the societal implications of heightened partisanship on American democracy.