(JTA) — The Democratic primary next week in Michigan’s 11th District could end a four-decade Jewish political dynasty — and spending by the country’s biggest pro-Israel lobby is playing a significant role.

Because of redistricting, the race pits two incumbent Democrats against each other: Rep. Andy Levin, a Jewish Democrat who favors conditioning aid to Israel and counts some of Congress’s most outspoken Israel critics as his friends, and Rep. Haley Stevens, a non-Jewish centrist whose Israel commitments lie mainly in assuring its military security.

Stevens has been the recipient...