Yes Eldo,  I also remember the attempted shooting of President Truman.  And also the shootings of President Kennedy and Bobby Kennedy as well as  the Rev.  Martin Luther King in the same era, and the attempted killing of President Reagan..... And then there were  Lincoln, McKinley  and Garfield..... and other attempts as well.
Our country does have quite a record of political violence, doesn't it?  It's time we Americans calm down and quit listening to those who would stir up our extreme anger.  (You've seen their rallies, charges of "enemy of the People!" ) There are even those who would like to provoke us in to a second Civil War.  (The first one killed some 2/3 of a million Americans, the most in any of our wars...and we were much smaller then.)
"Just say NO to demagogues!"