Thomas Jefferson put his daughters in a Catholic boarding school while he was ambassador to France.

Thomas Jefferson attended the College of William and Mary, a private protestant school that was publicly and privately funded.

James Madison attended Princeton University another private protestant university.

Cardinal Carroll, Charles Carroll, and Daniel Carroll, three of our Catholic founding fathers, were educated by the Jesuits in Maryland. Some of the protestant signers of the Declaration of Independence, the U.S. Constitution, and who voted to ratify the Bill of Rights were educated by the Jesuits of Maryland as well.

Most of the Bill of Rights is taken from Magna Carta which was written by a priest at the request of a Catholic Bishop.