We study how expanding immigrants’ rights affects their political and social Integration by leveraging Romania’s 2007 EU accession, which granted Romanian immigrants in Italy municipal voting and residency rights. Using municipality-level event studies, we find: (1) Enfranchisement increased the election of Romanian-born councilors—especially in competitive races—despite limited changes in candidacy rates. It also increased Romanian turnout, suggesting that electoral gains stem from an expanded voter base. An instrumented difference-in-differences analysis shows this is driven by pre-existing Romanian residents, not new arrivals. (2) Consent to organ donation rose among Romanians post-2007, indicating that the expansion of rights extends to prosocial behavior. (3) Nonetheless, immigrant presence continues to raise support for right-leaning parties and security spending while reducing social spending, highlighting persistent native backlash that outweighs immigrant political influence