In a video announcing his candidacy, Oberweis says he's taking on Senator Dick Durbin.
Oberweis has run for office several times for offices such as governor and U.S. Senator before he was elected last year to the state senate.
In those past campaigns, he has at times been criticized for political ads, most notably one in which he said the number of illegal immigrants coming into the country every week could fill Soldier Field. In this new video he says he's learned from his mistakes.
He says he’ll only serve two terms if elected.