 Giannoulias was elected the Democratic nominee for US Senate in Illinois in the February 2, 2010, primary, with 39.0% of the vote.David H. Hoffman received 33.8% and Cheryle Jackson received 19.7%.Giannoulias was endorsed by Planned Parenthood, the Service Employees International Union (SEIU), AFSCME, the AFL-CIO, the League of Conservation Voters, the Human Rights Campaign, the Chicago Sun-Times, and the Sierra Club (Planned Parenthood, the League of Conservation Voters, and the Human Rights Campaign had all supported Congressman Kirk in previous races).