But some people are biased against female presidential candidates. In 2017, a study found that about 13 percent of Americans were “angry or upset” about the idea of a woman serving as president. In an experiment that same year using hypothetical political candidates, Yoshikuni Ono and Barry Burden, political scientists at the University of Wisconsin at Madison, found that voters punish female candidates running for president by 2.4 percentage points. This means that a hypothetical female candidate would get, say, 47 percent of the vote, rather than 49.4 percent if she were a man.