William Lawrence, a progressive who drew the ire of the CBC for past comments, and el Sayed are set to rally in Lansing on Sunday.

Clyburn joins a wave of Congressional Black Caucus members backing Stevens as she faces former Michigan health official Abdul el Sayed.

Democrats are choosing between el Sayed, who is backed by socialists, and Haley Stevens, a more moderate candidate, in the Aug. 4 primary.

William Lawrence, a progressive who drew the ire of the CBC for past comments, and el Sayed are set to rally in Lansing on Sunday.

The focus gets at what Stevens and her campaign see as a vulnerability for el Sayed, her Democratic rival in the Aug. 4 primary.