Because what's good for Manhattan must be good for rural Idaho.
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Biden says he would mandate face masks nationwide if elected president

Democratic presidential nominee Joe Biden on Thursday said he would impose a federal mandate requiring people nationwide to wear masks when in public to curb the spread of COVID-19 if he's elected to the White House in November.

https://disrn.com/news/biden-says-he-would-mandate-face-masks-if-elected-president