The American Israel Public Affairs Committee is emerging as a central force in Illinois' crowded Democratic primary to replace retiring Representative Danny Davis. The group has reserved nearly $2 million in advertising to support Chicago City Treasurer Melissa Conyears-Ervin, marking the latest test of its political strength as debate intensifies within the Democratic Party over ties to Israel and the war in Gaza.

The organization and allied groups are among the top spenders in House races this cycle, with much of the funding directed to Illinois. Some newly formed groups backing candidates are not required to disclose their donors until after the primary, fueling criticism about undisclosed campaign money. None of the advertisements mention Israel, instead focusing on domestic issues such as healthcare and cost of living.

The spending push follows a recent primary in New Jersey where the group invested heavily but failed to defeat a progressive candidate critical of Israel. Despite that setback and mounting criticism, the organization says it plans to remain active in dozens of races. Its growing involvement has deepened divisions among Democrats, with progressive candidates openly condemning its influence while supporters argue concerns should focus on campaign finance laws rather than the advocacy group itself.