AIPAC's unprecedented financial investment into ousting Rep. Jamaal Bowman (D-N.Y.) has Democratic lawmakers grumbling about what they say is the pro-Israel group's heavy-handed approach.

Why it matters: Even some lawmakers who are generally supportive of Israel say the money is meant to intimidate Democrats away from criticism of the Jewish state.

• "It might change how they talk about [Israel]," one moderate House Democrat said of their colleagues, speaking on the condition of anonymity.