Really aren't most public and targetted killings of a politician considered assassination attempts by default regardless of the motivation? At least connotation

Really aren't most public and targetted killings of a politician considered assassination attempts by default regardless of the motivation? At least connotationally. John Hinkley shot Ronald Reagan not out of some statement against his policies but because of a deranged Jodie Foster obsession and bizzare belief that it would get her attention. Granted Hinkley himself also referred to it as an assassination.