Its the second, your right to keep and bear arms.
The right to keep and bear arms (often referred to as the right to bear arms) is a right for people to possess weapons (arms) for their own defense, still the state has the right to decide where you can and or cannot carry.
Indiana's polling locations may or may not be set up in a restricted area.
I was talking about the hat, not the gun.
Displaying your support for a candidate would be free speech, and protected under the first amendment, but I guess it's not allowed inside the polling station.