Religion is one of the most pandered issues in American politics. Candidates for the Republican nomination compete for the title of most religiously pious. President Obama professes to be a Christian. Of course, if he didn't he wouldn't be president. Though several presidents, none in recent history, have had no particular religious affiliation, they all claimed to be Christians.
|U.S. Religious Affiliation
Also included in the Pew poll are "unaffiliated" which includes atheist, agnostic, and "nothing in particular." For the nation as a whole 16% of those polled, that's about one in six and the 4th largest group just behind mainline Protestant, stated they were unaffiliated.
Of the 535 members of Congress exactly one is openly atheist. Panderbear concludes from these numbers that atheists and other non-affiliated people are underrepresented in the U.S. Congress by almost two orders of magnitude. This may make atheists the most underrepresented segment of the population in America. In a country that professes freedom of religion as a fundamental right, this seems more than a little hypocritical.