This was on the NRA's site. I don't know if this is state or federal that you can't wear political apparel while voting (never heard of that), but apparently the NRA is directly affiliated with the Republican party (at least according to one ballot worker).
http://dailycaller.com/2014/10/27/m...tructor-hat-while-voting-video/#disqus_thread
FTA:
http://dailycaller.com/2014/10/27/m...tructor-hat-while-voting-video/#disqus_thread
FTA:
While he was early voting on Friday, a Douglasville, Georgia man says he was asked to remove a hat he wears everywhere, one that reads “NRA Instructor,” because poll workers said it was too closely associated with the Republican party.