LANSING, Mich. (AP) — Michigan Gov. Gretchen Whitmer is toughening a requirement to wear masks during the coronavirus pandemic, mandating that businesses open to the public deny service or entry to customers who refuse to wear one. The governor on Friday also expanded where people must have a face covering beyond indoor public spaces. Starting immediately, they have to wear one outdoors if they cannot consistently keep 6 feet from non-household members, and while using public transportation, a taxi or a ride-sharing vehicle. Violators will be subject to a misdemeanor fine.