Must-win Michigan Senate race turns messy for Democrats amid fight over Israel and future of the party

<p>CNN's Manu Raju travels to Michigan to speak with voters ahead of the crucial Democratic primary for the state's open Senate seat his summer. Raju sits down with the three leading Democratic candidates, Abdul El-Sayed, State Sen. Mallory McMorrow, and U.S. Rep. Haley Stevens, as voters decide which kind of candidate could help them win this fall -- and potentially retake power in the Senate.</p>