Michigan Democratic Gov. Gretchen Whitmer endorsed Democratic Rep. Haley Stevens on Friday as the party's nominee for the United States Senate. And that strategy informs everything that I do, and that’s why I’m endorsing Haley Stevens for the U.S. Senate,” Whitmer said in a video posted to Stevens’ account. The nominee will replace outgoing Michigan Democratic Sen. Gary Peters. “I am absolutely thrilled to have [Whitmer's] endorsement for U.S. Senate,” Stevens said.