Are all the challenges to voting only occuring in swing states?

[napi21]

I was listening to Nightline, and they're talking about the Pubs challenging voters because a single piece of mail was returned as undeliverable, or some other such nonsense. But they referenced this kind of stuff happening in Ohio, Pa, and Fla. Is this happening everywhere, or is it just in the battleground states?

I voted yesterday in Ga. and waited in line for about 1 1/2 hours. There were absolutely NO problems at all. The lady in front of me in line had an address on her DL that was different than the one on her voter application, and I thought sure they were going to give her a hard time, but they didn't. They just told her there were request for "change of name and address forms" available on a table just inside the door. Just fill one out, and all will be just fine.

I don't dispute that this stuff is happening, but is this only happening in the battleground states, or is it elsewhere and I just don't hear about it?