Most of us, including President Joe Biden, who called upon Americans to "reject" political violence, may have been too quick to assume that the attempted assassination of Donald Trump on July 13 was politically motivated.

The FBI, by contrast, concedes that it hasn't identified a motive. That inability continued after an FBI search of the shooter's two cellphones failed to find "any indication of a motive, ideology or political views", CBS reported on July 17.

History reveals that not all high-level assassination attempts are politically motivated...