The first left-handed U.S. president was James Garfield, who served as the 20th president of the United States and is said to have been ambidextrous (capable of using both the left and the right hand). Herbert Hoover, who began his term in 1929, was likely the first fully left-handed president. Since then, a number of left-handed presidents have served, including Barack Obama, whose term began in 2008.
There used to be a common practice of teaching left-handed children to write with the right hand, which might account for an abundance of right-handed presidents early in U.S. History. Other left-handed presidents include Reagan, Clinton, Truman and George H.W. Bush.