Subject: Re: Operation Charlotte's Web
Assuming he is a U.S. citizen, he is not required to carry his U.S. passport.
However, most normal law abiding citizens generally carry some form of official I.D.--either a state-issued driver's license or a non-driver's I.D. in lieu of a driver's license.
This is not a big deal, at all.
Not for law-abiding people, that is.