Actually, you’re wrong. The 3rd district was the 5th before 1993 (from 1949-1993) and the 4th before 1949. Lipinski Father and Son have held the seat since 1982. No Republican has won this Congressional district in 114 years when Charles Stuart Wharton got it for a single term in 1904.
And with a mere 45% plurality with a socialist taking 20%.
The district was just a little chunk of ethnic White Chicago then.
https://www.ourcampaigns.com/RaceDetail.html?RaceID=397727
Only a fraction of it’s geographic territory is in the current third.
https://www.ourcampaigns.com/RaceDetail.html?RaceID=782800
The current third is shining example of rat gerrymandering, put some GOP ‘burbs in with a chunk of Chicago/Black suburbs that vote supermajority rat, wasting many GOP votes, several State Senate districts are the same thing.