Seriously, I hope that they do not permit guns at the Convention. I expect it will be a highly charged, emotional convention and the idea of adding guns to that mix, doesn't sound like a great idea. Now I am joking: John Kasich says he WILL be the nominee - with a gun there, he might make plans to ensure he is the only nominee.
I had a discussion with a facebook friend and former colleague who is very liberal. He posted a picture of a guy with a bandana over his nose and mouth, walking with a AR and a pistol in a holster at his side. The tag line: Good Guy or Bad Guy. You won't know until he starts shooting.
It really irks me when the anti-gun people take an extreme view. I'm in an open carry state, and I have yet to see anyone carrying an AR. If someon plans to kill people, having an open carry law or not is not going to make difference to them.