Or is he saying you can't be gay and a politician in America
There are a few Congress(wo)men who are gay. Barney Franks is the most well known. There is a some guy from Arizona who is gay as well and is a Republican. And there is some chick from somewhere who is a lesbian and in Congress. The House has smaller constituencies and in many cases one party has a very large majority in a particular congressional district. Obviously it is much easier to get elected if you represent a secular and/or liberal constituency. I can't imagine anyone who is gay getting elected to the House from a Bible Belt state.
I won't swear to it but if you are talking about a statewide office, AFAIK, no Senator, Governor, or Presidential candidate has ever been openly gay and been elected thereafter. Some people say President James Buchanon was gay since he was the only president who was single but who knows if that is true.
It's not just about being gay though, we can hardly get blacks or hispanics or asians or women elected to the Senate either. If you're a Senator, chances are still very good that you are white, male, over 50, Christian, Hetero, and Married/Widowed. Women are on the rise especially over the last decade. They're now up to 14% or so in both houses of Congress. Although one of those 14 female Senators, Lisa Murkowski, was appointed by the governor of AK who happens to be her father, and two of the others gained fame because of their husbands, Elizabeth Dole and Hillary Clinton.
If you exclude the current crop there were only 19 other female Senators in the 200 plus years beforehand and many were temporary appointments. Only six of those served full six year terms.
AFAIK we have zero black senators at present and we've had a grand total of two or three over 100+ years since reconstruction. We have zero hispanic senators at present as well and New Mexico is the only state to elect a Latino to the Senate AFAIK.
Ben Nighthorse Campbell is Native-American and the two Hawaiian Senators have tended to be Hawai'ian natives. But that's about it.
Fourteen women and three minorities. That puts the Senate at 83% white male although white males probably are about 35% of the population.