Gary North writes:
There has been a Christian nation called the United States. There has been a secular nation called the United States. (The dividing line was the Civil War, or War of Southern Secession, or War Between the States, or War of Northern Aggression -- take your pick.)
Van Til's Version of Common Grace - Dominion and Common Grace
This would mean that it was not George Washington and the Constitution that secularized America, it was Lincoln's repudiation of the Constitution and the Declaration of Independence (and its concept of the right to secession) that secularized America.
Bigger government does not aid Christianity; big government secularizes.