1970Final results
1970 election for Illinois Legislative District 12
Illinois State Senate · Illinois
Daniel P. Obrien Jr. (D) won with 52.6% of the vote, defeating Robert Lane Friedlander (R) by 5.3 points.
Daniel P. Obrien Jr.Democrat · winner
52.6%24,450
Robert Lane FriedlanderRepublican
47.4%21,993
46,443 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 1970
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET