John Lennon once remarked that the Beatles were "more popular than Jesus," explaining later that more people had bought Beatles albums than went to church.
It turns out, we atheists are less popular than the GEICO Cave Man. At least, more people would vote for the GEICO Cave Man, than would vote for an atheist.
The sad fact is, most of the first U.S. presidents—including Jefferson and Washington—were, famously, as close to atheists as the 18th Century allowed.
Who said voters were irrational?