It's a group of atheistic and agnostic Congressional members
It's a Republican group in Congress
It's a group of Congressional members who focus on science and technology
It's a Democratic group in Congress
Answer
The Congressional Freethought Caucus is a group of atheistic and agnostic members of the United States Congress. It was founded in 1998 by Rep. Pete Stark (D-CA), who was an atheist. The caucus's stated mission is to "promote the separation of church and state and to advocate for the rights of nonbelievers."
Jamie Raskin: A Journey through the Life and Politics of an American Statesman