In 2008, Baroni served as State Chairman of John McCain's presidential campaign in New Jersey. Baroni served in the Senate on the Joint Committee on the Public Schools, the Health, Human Services and Senior Citizens Committee, the Wagering, Tourism & Historic Preservation Committee and the Judiciary Committee. He was also the only Republican state senator who voted for a 2010 measure to allow same-sex marriage in New Jersey. He supports same sex marriage in Ireland, of which he is also a citizen.