Intense Illinois Senate primary set to take shape as Rep. Krishnamoorthi announces bid

The battle to replace Senate Minority Whip Dick Durbin in Illinois is intensifying with Rep. Raja Krishnamoorthi on Wednesday jumping into a crowded primary that has divided key Democratic factions in the blue state.

​ The battle to replace Senate Minority Whip Dick Durbin in Illinois is intensifying with Rep. Raja Krishnamoorthi on Wednesday jumping into a crowded primary that has divided key Democratic factions in the blue state. Read More Breaking News, Latest News and Videos | CNN