Cheryle Jackson makes Illinois 2010 Senate bid official in September. Alexi gets some union backing

WASHINGTON–After a short exploration period, Chicago Urban League chief Cheryle Jackson will officially get in the Illinois 2010 Senate Democratic primary in September. Her bid will be about, she said,”change, community opportunity and an end to catering to the privileged few on the inside while the rest of us on the outside look on.”

The only other rival for sure so far: Illinois Treasurer Alexi Giannoulias, who on Monday picked up the backing from several unions: UNITE HERE, UFCW, UA International and the Illinois Pipes Trades Association.