Canvassers for Elon Musk’s America Pac say that they were flown to Michigan and told they had to meet unattainable quotas or risk paying for their own accommodations and travel home. Then they were unceremoniously fired after some of them spoke to the press.

The workers — many of whom are Black — told Wired that Blitz Canvassing, a subcontractor for Musk’s Pac, had them sign nondisclosure agreements and transported them to Michigan neighborhoods in the back of a U-Haul without seats or seat belts. After Wired ran an initial story about their working conditions,...