(CNN) - The Democratic state treasurer and a five-term Republican congressman will face off in November to fill the U.S. Senate seat once held by President Obama.
Front-runner Alexi Giannoulias faced criticism after his family's bank came under federal scrutiny. But he beat fellow Democrat David Hoffman, a former Chicago official in charge of trying to root out corruption, by a small margin.
Giannoulias, the son of Greek immigrants, was able to raise money and come out on top in a crowded Democratic field.
"The voters of Illinois are sending a message, and I hear them them loud and clear. In the midst of this dreadful economic crisis, they want a senator who will fight to limit the power of Washington special interests," Giannoulias said Tuesday night at his victory rally.