Republican nominee Mark Kirk won with an overwhelming margin over Democratic bet Alexi Giannoulias  at the 2010 United States Senate elections in Illinois and as of 2020, he is the last Republican to succeed at the US Senate elections in Illinois.
Republican nominee Mark Kirk won with an overwhelming margin over Democratic bet Alexi Giannoulias  at the 2010 United States Senate elections in Illinois and as of 2020, he is the last Republican to succeed at the US Senate elections in Illinois.