TIL that since Herbert Hoover became President of the US in 1929, 7 out of 16 (43.7%) presidents were left handers. The general rate for lefties in the US is 1 out of 10 (10%).

https://en.wikipedia.org/wiki/List_of_left-handed_presidents_of_the_United_States#Left-handed_presidents_of_the_United_States

https://www.reddit.com/r/todayilearned/comments/153lm0b/til_that_since_herbert_hoover_became_president_of/