It is part of our ‘Mormon’ theology that the Constitution of the United States was divinely inspired; that our Republic came into existence through wise men raised up for that very purpose. We believe it is the duty of the members of the Church to see that this Republic is not subverted either by any sudden or constant erosion of those principles which gave this Nation its birth.

President David O. McKay

I reverence the Constitution of the United States as a sacred document. To me its words are akin to the revelations of God, for God has placed his stamp of approval on the Constitution of this land. I testify that the God of heaven sent some of his choicest spirits to lay the foundation of this government, and he has sent other choice spirits…to preserve it.

President Ezra Taft Benson

And that law of the land which is constitutional, supporting that principle of freedom in maintaining rights and privileges, belongs to all mankind, and is justifiable before me. Therefore, I, the Lord, justify you, and your brethren of my church, in befriending that law which is the constitutional law of the land…

Doctrine & Covenants 98:5-6

According to the laws and constitution of the people, which I have suffered to be established, and should be maintained for the rights and protection of all flesh, according to just and holy principles…  And for this purpose have I established the Constitution of this land, by the hands of wise men whom I raised up unto this very purpose, and redeemed the land by the shedding of blood.

Doctrine & Covenants 101:77,80

The following three-minute video is based on The 5000 Year Leap, a book by the late LDS author and political commentator W. Cleon Skousen.

http://www.youtube.com/v/jrwJMMsF110&hl=en_US&fs=1?rel=0&color1=0x5d1719&color2=0xcd311b&border=1

About the quotations used above

David O. McKay (1873-1970) was the ninth President of The Church of Jesus Christ of Latter-day Saints.

Ezra Taft Benson (1899-1994) was the thirteenth President of The Church of Jesus Christ of Latter-day Saints.

The Doctrine and Covenants is a sacred scripture of The Church of Jesus Christ of Latter-day Saints.  The passages quoted above represent the words of Jesus Christ as spoken to and recorded by the Prophet Joseph Smith.   Learn more about the Doctrine and Covenants (the D&C) from the Encyclopedia of Mormonism.