Next Tuesday’s contest in Michigan between Abdul El-Sayed and Rep. Haley Stevens holds a dubious distinction: No Democratic congressional primary in history has ever attracted so much super PAC cash. The overwhelming majority of the outside money has gone toward ensuring that Stevens, a moderate, pro-Israel Democrat, defeats El-Sayed, a Bernie Sanders-endorsed champion of Medicare for All and Israel critic.

More than $60 million of outside spending has poured into the Senate contest, according to records from the Federal Election Commission and the Federal Communications Commission. The vast majority has come from super PACs that—unlike El-Sayed’s and Stevens’ own campaigns—can accept unlimited donations.

Brendan Glavin, the director of insights at OpenSecrets, which tracks money in politics, said the level of outside spending in Michigan far exceeds the top Senate races from 2024. “We’re taking this huge leap up,” he explained. “It’s really exploded.” Only this year’s Republican Senate primary in Texas, where John Cornyn lost to Ken Paxton despite a large funding advantage, appears to have attracted more outside money.

The biggest spender by far in Michigan is the United Democracy Project, a super PAC backed by the American Israel Public Affairs Committee that works to elect pro-Israel candidates. UDP has spent more $30 million backing Stevens, according to FEC records—twice as much as it has ever spent on a single race. (The super PAC hit its previous high in 2024, when it spent more than $14 million to defeat former Rep. Jamaal Bowman in a Democratic House primary in New York.) Additional records show that Stevens has also benefitted from a super PAC that in the past has received donations from companies including Chevron and a subsidiary of the tobacco giant Philip Morris.

The race in Michigan—an open seat that Democrats need to hold to take back the Senate—started out as a competitive three-person contest that initially included Mallory McMorrow, a state senator backed by Sen. Elizabeth Warren (D-Mass.) who tried to occupy the ideological lane between El-Sayed and Stevens. But despite strong fundraising and early polling, McMorrow struggled to remain competitive and dropped out in early July.

It means that Michigan primary voters now have an unusually clear choice to make. El-Sayed has the endorsement of key players on the left like Sanders, Rep. Alexandria Ocasio-Cortez (D-N.Y.), and the United Auto Workers. Stevens is understood to be the favorite of Senate Minority Leader Chuck Schumer (D-N.Y.) and was recently endorsed by Michigan Governor Gretchen Whitmer.

At a national level, the results on Tuesday will be closely watched to see if populist outsiders like El-Sayed can continue to topple favorites of the........

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