Massachusetts Sen. Elizabeth Warren is wading into Michigan’s closely contested Democratic Senate primary, backing state Sen. Mallory McMorrow over two rivals.

It’s a somewhat counterintuitive endorsement for the progressive U.S. senator who has made her backing of Medicare for All a core part of her political identity. McMorrow opposes Medicare for All, while Abdul El-Sayed, one of McMorrow’s opponents, supports it.

But the endorsement is a coup for McMorrow as she seeks to win over the progressive wing of the party in her bid to succeed retiring Democratic Sen. Gary Peters. McMorrow has now secured endorsements from four senators — with…

Read the full article at POLITICO.COM