Several of the later American presidents were left-handed. Who was not?

Explanation

Around 10% of all men and 8% of all women are left-handed. This means that they prefer to e.g. write, throw and eat with their left hand. Although left-handers only make up less than 10% of the population at large, many later American presidents have been left-handed: Gerald Ford, Ronald Reagan, George H.W. Bush, Bill Clinton and Barack Obama.