Munoz unseated incumbent Democrat member of the Illinois Senate
Jesús "Chuy" García in the 1998 election. Munoz was backed by the
Hispanic Democratic Organization as well as Mayor
Richard M. Daley's campaign. Munoz defeated García by 6,924 votes (53.72%) to 5,964 (46.28%). Munoz was Chairman of the Transportation Committee; Vice-Chairman of Environment and Energy; and Sub-Chairman on the Subcommittee on Licensed Professionals. Additionally he served on Appropriations III; Licensed Activities; Subcommittee on Tollways; Senate Task Force on Illinois Alcoholic Beverage Laws; and the Revenue Special Issues Subcommittee. He is also co-founder and treasurer of the Latino Caucus. Munoz helped pass a bill to grant Illinois’ children of illegal immigrants access to instate tuition levels so that they can continue their education at the state's public colleges and universities. This bill would allow students who have attended school in Illinois for at least three years and graduated from a high school in Illinois to pay in-state tuition regardless of their immigration status. In 2006, Munoz co-sponsored a bill to expand the ability of local police agencies to use money generated by fines stemming from convictions for
driving under the influence. This bill allows for a much wider use of DUI funds by law enforcement in combating alcohol-related crimes, like training and setting up check points. Before this law, the funds could only be used for purchasing equipment. In 2018,
JB Pritzker appointed Munoz to the gubernatorial transition's Restorative Justice and Safe Communities Committee. == Personal life ==