Michigan's Democratic Senate primary is underway, with a closely watched contest between progressive favorite Abdul El-Sayed and moderate U.S. Rep. Haley Stevens. This primary is viewed as a proxy battle between the Democratic party's establishment and its progressive wing, with implications for control of the Senate. El-Sayed, a former public health official, campaigns on platforms like Medicare for All, campaign finance reform, and ending military aid to Israel. Stevens, a four-term congresswoman, has focused on improving Obamacare and maintaining a pro-Israel stance.

The race has been incredibly expensive, with over $60 million in outside money pouring into the contest. A significant portion of this funding, more than $30 million, has come from the American Israel Public Affairs Committee (AIPAC) and its affiliates, supporting Stevens. This substantial spending highlights the influence of pro-Israel organizations in Democratic primaries. Conversely, El-Sayed has garnered support from prominent progressive figures such as Senator Bernie Sanders and U.S. Rep. Alexandria Ocasio-Cortez.

Recent polls have shown El-Sayed leading Stevens by double digits, suggesting a potential upset for the progressive candidate despite the vast financial backing for Stevens. This outcome, if it materializes, would indicate the limits of money in political campaigns and could signal a shift in the Democratic Party's base. The primary's result will test the growing clout of the progressive wing and a powerful pro-Israel organization within the Democratic Party, with the winner advancing to a critical November general election that could determine the party's chances of reclaiming a Senate majority.