First elected to the New York State Senate in a 1994 special election, Kruger represented Senate District 27 in Brooklyn. In February 2007, then-Senate Majority Leader
Joseph Bruno—a Republican—appointed Kruger Chair of the Senate Social Services Committee, making him the first minority party senator to chair a committee in New York history. Kruger later chaired the powerful Senate Finance Committee. In February 2007, Kruger presented legislation attempting to ban the use of electronic devices, such as
mp3 players and
mobile phones, in
New York City crosswalks. Kruger, along with Sens.
Rubén Díaz Sr. (Bronx),
Pedro Espada Jr. (Bronx), and Hiram Monserrate (Queens), threatened to abandon the Democratic majority that was elected to the New York State Senate on November 4, 2008. The self-named "Gang of Four" refused to back
Malcolm Smith of Queens as the chamber's majority leader and sought concessions. Monserrate soon rejoined the caucus after reaching an agreement with Smith that reportedly included the chairmanship of the Consumer Affairs Committee. The remaining "
Gang of Three" reached an initial compromise in early December that collapsed within a week, but was ultimately resolved with Smith becoming majority leader. On December 2, 2009, Kruger was one of eight Democrats to vote against a
same-sex marriage bill that failed to pass the Senate. On June 13, 2011, it was announced that he,
Joseph Addabbo Jr. and
Shirley Huntley had switched their intentions from "against" to "for" a pending same-sex marriage bill. Kruger voted in favor of the Marriage Equality Act in 2011; the bill passed the Senate and was signed into law by Gov. Andrew Cuomo. In 2011, Kruger introduced a bill "that would ban the use of
mobile phones,
iPods or other electronic devices while crossing streets — runners and other exercisers included." ==Federal prosecution and guilty plea==