Considering Christians are 75% of the country, the chances of a gay being elected are pretty damn slim.
The general trend is towards atheism, so that won't be the case for long.
Proof?
A study done by the Graduate Center of the City University of New York found that the percentage of the population that describes itself as “nonreligious” more than doubled from 1990 to 2001, from 14.3 million to 29.4 million people. The only other group to show growth was Muslims. . .
A study by the Pew Forum on Religion and Public Life found that 16 percent of Americans (about 35 million) consider themselves “unaffiliated” — a category that includes “unaffiliated believers,” “secularists” and atheists/agnostics.
The latter terms — atheists and agnostics — are lumped together, says Green, because they share so many similarities. But there is a subtle difference: Atheists forthrightly affirm that there is no God; agnostics simply say as humans we can never know. Together, they constitute about 3 percent of the American population.
http://www.intheagora.com/archives/2006/03/atheism_is_the_fastest_growing_religious_identity_in_america/