Cute, but not credible. Need I remind you that defining political opponents as insane really IS the province of the left? Josef Stalin may not have invented the tactic, but he certainly pursued it with vigor.
Yes, except that Hinkley is indeed mentally insane.
I am willing to listen, but can you produce three examples of non-leftists who have attempted or succeeded in assassinating American Presidents?
Even with three, I agree with the other poster that it is at trend.
And, as an aside, I do believe Liberalism is a mental illness and there are plenty of reasons, not just a tool to smear as the liberals did with Whittaker Chambers, and nearly every conservative they disagreed with, all of which are indeed verifiable.