Christian Churches Together
Christian Churches Together in the USA (CCT) is an organization formed in 2006 to "broaden and expand fellowship, unity, and witness among the diverse expressions of Christian traditions in the USA" and that represents over 98 million Christians in the United States. Christian Churches Together was created as a space for dialogue and cooperation among churches and ecumenical Christian organizations.
Source: Wikipedia — Christian Churches Together (CC BY-SA 4.0)