"According to a January 2018 Poll by Gallup, 37% of Americans consider football their favorite spectator sport, while 11% prefer basketball, 9% baseball, and 7% soccer. There is some variation by viewer demographics. Men, show a stronger preference for football than women, conservatives a stronger preference than liberals, and those over 35 a stronger preference than those under 35. In all groups, however, football is still the most popular. Basketball and soccer are more popular among liberals than conservatives.[101]"

Mods can adjudicate in case of a debate over how this should resolve, when the time comes. I won't bet.

Edit: I edited it to clarify "In the US". Hopefully no one bet based on the assumption that I meant globally or that they would win on a technicality.