It's been enlightening reading about past presidential campaigns in this country.
For example, when John Frémont ran for president in 1856, he was rumored to be a secret Catholic. (He was actually Episcopalian.)
When Al Smith, the first actual Catholic nominee, ran in 1928, people said that as soon as he entered office he would extend the Holland Tunnel to the basement of the Vatican.
Nowadays, this issue has receded so much from our national consciousness that no one seems to notice we're on the verge of electing the first Catholic vice president.
It's striking how much has changed, yet how little.