Illinois Senate president John Cullerton endorses Alexi Giannoulias for US Senate

State Senate President John Cullerton will endorse State Treasurer Alexi Giannoulias for U.S. Senate today.

Cullerton becomes the highest-profile elected official to endorse Giannoulias so far, though Giannoulias has a long-running friendship with President Obama.

Giannoulias is the only major Democrat to announce for U.S. Senate, though Urban League President Cheryle Jackson and Merchandise Mart President Chris Kennedy may jump in.