More than two-thirds of the media buys in the Illinois Senate race have gone toward Representative Raja Krishnamoorthi, with much of that coming from his own campaign.
Several groups with ties to the pro-Israel group have spent at least $20 million in four primaries backing candidates who are likely to support their cause in Washington.
Groups associated with the American Israel Public Affairs Committee have focused much of their spending in the Ninth District, seeking to bolster Laura Fine, a state senator, against Daniel Biss, the mayor of Evanston.