Diane Pappas

Illinois House of Representatives 2018 election Pappas became politically involved in 2018 when she became an elected precinct committeewoman with the local Democratic organization in Addison Township. Pappas narrowly defeated Republican incumbent Christine Winger with 50.8% of the vote to represent the Republican-leaning district.

2020 election Pappas lost the 2020 general election to Republican candidate Seth Lewis.

Tenure Pappas represented Illinois 45th district, which at the time was located in northern DuPage County and included all or parts of Addison, Bartlett, Bloomingdale, Carol Stream, Hanover Park, Itasca, Medinah, Roselle, Wayne, West Chicago, and Wood Dale. Pappas was sworn into office on January 9, 2019. During the 101st General Assembly, Pappas served on the following committees: Adoption & Child Welfare; Cities & Villages; Cybersecurity, Data Analytics, & IT; General Service Appropriations-General Service; and Prescription Drug Affordability.

Airport noise mitigation Pappas proposed the creation of an income tax credit in an amount equal to the amount paid by the taxpayer for purchasing acoustical materials, other materials, labor, and professional services to soundproof a residential home located near airports against aircraft noise. This credit, if passed, would have allowed constituents living near O'Hare International Airport's new flightpaths to soundproof their homes.

Healthcare Along with Deb Conroy, Pappas introduced legislation to provide coverage for the treatment of serious mental illnesses and serious emotional disturbances.

Diane Pappas is pro-choice on abortion and voted for the Reproductive Healthcare Act. Dan Proft's conservative political publications and Republican legislators Mark Batinick (R-Plainfield) and Darren Bailey (R-Xenia) criticized Pappas for an alleged remark that invoked castration when speaking about female autonomy at a town hall.

Tax reforms Pappas proposed House Bill 338 which would create an assessment freeze homestead exemption for persons receiving federal Supplemental Security Income; a means tested program that is part of the Social Security Act. Pappas voted to place a referendum on the 2020 general election ballot that would allow the state of Illinois to repeal its current flat tax structure in favor of a progressive tax structure if passed by 60% of voters. Pappas supported Senate Bill 1217, which lowered the amount of money that municipalities are required to devote to tourism from the hotel/motel tax from 100% to 75%. The change had been long sought by local leaders in smaller towns to fund economic development efforts and infrastructure improvements.

Illinois Senate Pappas was appointed to the Illinois Senate to succeed Tom Cullerton after Cullerton pleaded guilty to federal embezzlement charges and resigned from office.

As of July 2022, Senator Pappas is a member of the following Illinois Senate committees:

Energy and Public Utilities Committee (SENE) Insurance Committee (SINS) Transportation Committee (STRN) Veterans Affairs Committee (SVET)

Electoral history