The Supreme Court did in 1947.
During the 1870s, 1880s, and 1890s, yet another group which challenged specific Christian principles in government arrived before the Supreme Court. Jefferson’s letter had remained unused for years, for as time had progressed after its use in 1802—and after no national denomination had been established—his letter had fallen into obscurity. But now—75 years later—in the case Reynolds v. United States, the plaintiffs resurrected Jefferson’s letter, hope to use it to their advantage.
In that case, the Court printed an lengthy segment of Jefferson’s letter and then used his letter on "separation of church and state" to again prove that it was permissible to maintain Christian values, principles, and practices in official policy. For the next 15 years during that legal controversy, the Supreme Court utilized Jefferson’s letter to ensure that Christian principles remained a part of government.
Following this controversy, Jefferson’s letter again fell into disuse. It then remained silent for the next 70 years until 1947, when, in Everson v. Board of Education, the Court, for the first time, did not cite Jefferson’s entire letter, but selected only eight words from it. The Court now announced:
"The First Amendment has erected ‘a wall of separation between church and state.’ That wall must be kept high and impregnable."
This was a new philosophy for the Court. Why would the Court take Jefferson’s letter completely out of context and cite only eight of its words? Dr. William James, the Father of modern Psychology—and a strong opponent of religious principles in government and education—perhaps explained the Court’s new strategy when he stated:
"There is nothing so absurd but if you repeat it often enough people will believe it."
This statement precisely describes the tact utilized by the Court in the years following its 1947 announcement. The Court began regularly to speak of a "separation of church and state," broadly explaining that, "This is what the Founders wanted—separation of church and state. This is their great intent." The Court failed to quote the Founders; it just generically asserted that this is what the Founders wanted.
The courts continued on this track so steadily that, in 1958, in a case called Baer v. Kolmorgen, one of the judges was tired of hearing the phrase and wrote a dissent warning that if the court did not stop talking about the "separation of church and state," people were going to start thinking it was part of the Constitution. That warning was in 1958!
Nevertheless, the Court continued to talk about separation until June 25th, 1962, when, in the case Engle v. Vitale, the Court delivered the first ever ruling which completely separated Christian principles from education.
With that case, a whole new trend was established and secular humanism became the religion of America. In 1992 the Supreme Court stated the unthinkable. "At the heart of liberty is the right to define one’s own concept of existence, of meaning, of the universe, and of the mystery of human life. In 1997, 40 prominent Catholic and Protestant scholars wrote a position paper entitled, "We Hold These Truths," in which they stated, "This is the very antithesis of the ordered liberty affirmed by the Founders. Liberty in this debased sense is utterly disengaged from the concept of responsibility and community and is pitted against the ‘laws of nature and the laws of nature’s God. Such liberty degenerates into license and throws into question the very possibility of the rule of law itself.