In 2004, Velella resigned as a State Senator and Bronx Republican Chairman after pleading guilty to a corruption charge. Members of the Bronx Republican County Committee first elected Tosi as the "interim" chairman, and several months later unanimously elected him Permanent Chairman. In his capacity, Tosi campaigned for the election of Assemblyman
Stephen B. Kaufman to succeed Velella. Members of the New York State Senate Republican Committee recruited Kaufman, a long-time Democrat, to run for the seat. In previous elections, Kaufman had the endorsement of the
Bronx Conservative Party and had the reputation of being a moderate. To increase the chances of his election in a district that was becoming more Democratic, Kaufman sought both the Republican and Democratic nominations. If elected, Kaufman would caucus with the Republicans in the Senate and, in effect, allow them to keep the seat they held since 1966. However, Assemblyman
Jeffrey Klein challenged Kaufman for the Democratic nomination. A Republican challenger, John Fleming, a retired police officer, abandoned plans to run against Congressman
Eliot Engel (D-NY) and challenged Kaufman for both the Republican and Conservative nominations. On primary day, Kaufman lost both the Democratic and Republican primaries. He did win the Conservative nomination and also had the support of the New York State Independence Party. Kaufman stayed in the race as a spoiler, and Assemblyman Klein won the seat in the general election. In 2005, Tosi coordinated the New York City Republican endorsement for reelection of Michael Bloomberg as Mayor. Tosi resigned as Bronx GOP Chairman as he completed his seminary candidacy and prepared for ordination as a Permanent Deacon in the Roman Catholic Church.
Joseph J. Savino, Velella's former deputy chief of staff, was elected the new chairman. Velella, who had completed his prison term, accused his two former employees, Tosi and Savino, of seizing control of the Bronx GOP illegally. ==Other==