A crowded Democratic primary in Illinois is shaping up as the next test for the American Israel Public Affairs Committee, a powerful advocacy organization that has stirred anger and frustration while exacerbating tensions over the war in Gaza. The aggressive spending comes after AIPAC put $2 million into a recent Democratic primary for a special election in New Jersey, an effort that’s widely considered to have backfired. AIPAC targeted Tom Malinowski, a former congressman who narrowly lost to progressive candidate Analilia Mejia — who is outspoken in her criticism of Israel.