Kamala Harris campaigned Tuesday with Michigan Senate nominee Abdul El-Sayed, predicting that the progressive will become a “national voice” during a joint appearance between two Democrats in a state crucial to the party’s fortunes in this fall’s midterms — and the presidential primary to follow.

Former Vice President Kamala Harris urged Michigan voters on Sept. 22 to support Democratic U.S. Senate candidate Abdul El-Sayed, contending that he will fight to protect maternal health care and oppo...