A few assholes? More Politicians have been killed or injured by lefties then someone on the right.
Umm. What? You need to quote some statistics on this. Where in the fuck are you getting this nonsense?
Let's start with Kennedy He was killed by Lee Harvey Oswald
Arthur Bremer was planning on assassinating Nixon but couldn't because of the secret service protection of Nixon instead a week later shot George Wallace. Also notable Arthur Bremer born and lived in Wisconsin
Gerald Ford had an assassination attempt on him by Lynette Fromme who was a follower of Charles Manson and Sara Jane Moore also tried to assassinate Ford.
Most recent was Gifford
There is more just don't have the time to the the search.