Despite record amounts of outside spending and attacks from the Democratic establishment, Abdul El-Sayed prevailed in a bitter primary race for the U.S. Senate seat in Michigan.

Voters in the key swing state chose El-Sayed over the establishment’s choice of Rep. Haley Stevens, whose campaign received about $60 million in support from pro-corporate and pro-Israel super PACs, making the race the most expensive Democratic primary ever. El-Sayed won by a margin of around one percentage point, according to the Associated Press, which called the race in his favor Wednesday morning.

The victory of El-Sayed, a former public health official endorsed by Sen. Bernie Sanders and Rep. Alexandria Ocasio-Cortez, is the latest sign of the growing influence of the Democratic left. And it’s the most staggering illustration yet of the party establishment’s waning grip on power and the unpopularity of the pro-Israel lobby giant, the American Israel Public Affairs Committee, amid shifting American sentiment on Israel and Palestine.

Through its super PAC, the United Democracy Project, AIPAC broke its own single-race spending record by funding $30 million in attack ads against El-Sayed. Ads that dominated airwaves, flooded streaming services, and stuffed mailboxes in the final month of the race misrepresented El-Sayed’s previous comments about Michelle Obama and Michigan Gov. Gretchen Whitmer to allege misogyny, and attempted to paint El-Sayed as a terrorist sympathizer.