In Maryland, we allow voters to wear whatever they want, but they cannot talk politics inside the 100 foot marker, nor linger in the room when they are finished voting if they have any political messages on their shirt that could be construed as 'electioneering'. They can carry fliers in, but must keep them on their person while voting, take them with them on the way out, and not pass them to others within the 100 foot 'no electioneering' zone.