At least seven of the 46 men who have held the office of United States president have been left-handed.[1][2] Only one U.S. president prior to the 20th century was known to be left-handed.[3] Since World War II there have been fourteen different U.S. presidents[1] and six of them have been left-handed.[4][5]
Various theories about why left-handers are overrepresented among U.S. presidents have been proposed. Biologist Amar Klar studied handedness and determined that left-handed people, "...have a wider scope of thinking".[5] In a 2019 Journal of Neurosurgery article Nathan R. Selden argued that since left-handed people are right-hemisphere–dominant individuals, this might make presidents, "more effective leaders or at least more effective political candidates".[6] A University of British Columbia psychology professor, Stanley Coren, authored the book The Left-Handed Syndrome, in which he claimed that "left-handers actually have a profile that works very well for a politician".[7] In a 2021 Business Insider article titled, "From Barack Obama to Julius Caesar, here are 12 world leaders who were left-handed" reporters Alexandra Ma and Talia Lakritz state, "According to some research, lefties may be more creative, be better at 'divergent thinking' — generating new ideas based on existing information — and face challenges better."[8][9]
Medical researcher Jonathan Belsey argued that, given a 13% prevalence of left-handedness, the long-term average is not statistically high, but rather has a p-value of 0.77, and that even the post-1881 prevalence has a 0.10 likelihood of occurring by chance.[2]