Michigan Democrats vote Tuesday in a Senate primary that pits progressive Abdul El-Sayed against moderate Rep. Haley Stevens, a race that highlights the party's internal split over priorities. El-Sayed, a physician, has campaigned on a progressive platform, including his views on the Democratic Socialists of America and how he would work with established Democrats if elected. Stevens, the incumbent, represents the party's moderate wing. The contest is one of the most closely watched primaries of the midterm election season, drawing national attention as it reflects the broader debate among Democrats about their direction. The outcome in the primary will signal which wing of the party holds greater appeal as the midterms approach.