PEW RESEARCH CENTERAnna Schiller When it comes to religious affiliation, the 117th U.S. Congress looks similar to the previous Congress but quite different from Americans overall. While about a quarter (26%) of U.S. adults are religiously unaffiliated – describing themselves as atheist, agnostic or “nothing in particular” – just one member of the new Congress (Sen. Kyrsten Sinema, D-Ariz.) identifies