2 Chronicles 34:19 states,
And when the king heard the words of the Law, he tore his clothes.
Oh, how I hope and pray that the leaders of our nation (and all nations) will, like King Josiah, discover the Bible and recognize the great sins of our nation. Then, perhaps, God will, in his great mercy, spare us from his coming judgment.
We can see in the examples of the Old Testament how the nation of Israel was profoundly effected (for both good and evil) by the faith of its leaders. Godly sorrow, repentance and saving faith from our leaders would provide a similar example and could lead to amazing revival. While our current trajectory often seems hopeless, with God all things are possible. We can never lose our hope when it is placed in him.