Well before the Manhattan Declaration took place in 2009, there was another important ecumenical document agreed upon and signed by our countries Christian leadership. It laid the groundwork for Evangelicals to set aside their distinctive doctrines and unite with the Catholic Church and other religions.
The Evangelicals and Catholics Together: The Christian Mission in the Third Millennium document was authored and presented in May of 1994 by Charles Colson of Prison Fellowship and Roman Catholic priest, Richard John Neuhaus. In 1993, Chuck Colson was the recipient of the $1,000,000 “Prize for Progress in Religion,” presented annually by New Age financier, John Templeton.
Prison Fellowship International boasts of its Special Consultative Status as a non-governmental organization (NGO) of the United Nations. Father Richard Neuhaus is the director of the Institute on Religion and Public Life -- a Roman Catholic priest who, as former Lutheran and a seminary student, rejected the doctrine of justification by faith in Jesus Christ. 
The ECT Document was signed by 20 Catholic leaders and 20 Evangelical leaders including:
Dr. Bill Bright of Campus Crusade for Christ
Pat Robertson, President of CBN and member of the CNP
J. I. Packer of Christianity Today
Richard Land and Larry Lewis of the Southern Baptist Convention (a denomination controlled by Freemasons)
Jesse Miranda of Assemblies of God (which attends ecumenical meetings with the World Council of Churches and Roman Catholic Church)
Dr. John White, President of Geneva College and President of the Board of Administration of the National Association of Evangelicals (evolved from the Evangelical Alliance formed in 1851 in United Grand Lodge of England)
Os Guiness, Trinity Forum
Dr. Mark Noll, Wheaton College
Supporters of The Evangelicals and Catholics Together Document maintain that it is not a statement of theological agreement, but of unity for the cause of moral and social reform. For more information on this document, go to their website.