Three of our last four presidents have been left-handed:

Bush I: Left-handed
Clinton: Left-handed
Bush II: Right-handed
Obama: Left-handed

The same would be true if John McCain had won the last election — he’s a leftie too. Indeed, fully half of American presidents since Truman have been southpaws, though only 10 percent of the general population is left-handed.

What accounts for this? Who knows? But UCLA geneticist Daniel Geschwind says, “Six out of the past 12 presidents is statistically significant, and probably means something.”