Leading Corporate America in accepting legal marijuana. “Companies recognize that they don’t screen for alcohol,” said John Challenger, co-founder of Challenger, Gray & Christmas, a Chicago-based employment firm. “So why would they do it for marijuana?

The largest U.S. auto-dealer chain has lightened up on lighting up. AutoNation Inc. no longer refuses to hire job applicants who test positive for marijuana in drug screenings, Chief Executive Officer Mike Jackson said in an interview. The shift, which Jackson said...