https://apnews.com/d23e7be18434e149623271c4c1929c77

Pandemic politics shadowed President Donald Trump’s trip to Michigan to highlight lifesaving medical devices, with the president and officials from the electoral battleground state clashing over federal aid, mail-in ballots and face masks.

The president did not wear a face covering Thursday despite a warning from the state’s top law enforcement officer that a refusal to do so might lead to a ban on Trump's return.