To an outsider, the biggest question of the 2016 U.S. presidential election may be how the country came to be stuck with such an imperfect field of candidates. Higher percentages of potential voters view the front-runners, Hillary Clinton and Donald Trump, unfavorably than favorably. The net favorability ratings of the current field are the lowest in recent history.
A popular explanation is that people are fed up with politics as usual, but even the candidate who has done better than others at riding this discontent -- Trump -- is disliked by most voters.
I have my own theory: Over time, U.S. presidential elections have evolved into a sports event, and that has affected the self-selection of candidates.
Americans are obsessed with sports, particularly with statistics. Soccer fans in Europe and Latin America care far less about players' and teams' stats than do baseball and football fans. That carries over to politics, producing superstitions such as the "Redskins Rule" (if the Washington Redskins lose in their final home game before the presidential vote, the incumbent will lose).