In 2018, Delia was recruited by community organizations to run for the Illinois General Assembly and with a grass roots and community centered campaign she was elected as State Representative for the 4th House District of Illinois. She was recruited to help find, fund and implement solutions to address community problems. Since her election four years ago, she has successfully passed legislation expanding affordable housing, securing over 450 million to build affordable housing, expanding Medicaid coverage to senior citizens regardless of immigration status, protecting abortion rights, and creating an elected school board in the City of Chicago. She is the co-founder of the Illinois House Progressive Caucus and now serves as Assistant Majority Leader.