The FBI long has posited that the Mafia cannot exist without public corruption, and its thesis certainly was proven in Elizabeth, NJ where Thomas Dunn provided political protection to the DeCavalcante boys. An FBI memo dated January 15, 1960 based on "a reliable source" details "that on 12/6/59 a meeting was held at the Hotel Warwick, NYC, which was attended by the following: NICHOLAS DELMORE, JOSEPH STASSI, THOMAS DUNN -- Democratic candidate for Mayor in forthcoming Elizabeth election, NICHOLAS LA CORTE, former Elizabeth Mayor and Independent candidate for Mayor in coming Elizabeth election."
The memo further provides that according to the FBI source who attended the meeting "DUNN is apparently given an excellent chance for election and DELMORE and STASSI pledged their support and $50,000 to his campaign," and "[f]or this, they will receive the protection of the Mayor's Office in conducting gambling activities in Elizabeth." The "City of Elizabeth was discussed as to its division and the location of horse parlors and numbers books which would be handled and parceled out at the direction of DELMORE and STASSI."
Dunn -- a city council member since 1952 -- narrowly lost the mayoral election to incumbent Steven Bercik but ultimately obtained it in 1964 and held onto the office until 1992. In 1969 the FBI released wiretapped conversations it had recorded between Dunn and Sam DeCavalcante in which the mob boss is heard pledging his support to the corrupt mayor. Apparently the Elizabeth voters did not much care.
Further reading that may be of interest: