Why do President and Vice President support gay marriage?

"Vice President Joe Biden has apologized to President Barack Obama for putting him in a tough position that led to Obama's announcement that he now supports same-sex marriage, senior administration officials said Thursday. Obama said in an interview that aired Thursday on ABC that he made his decision public earlier than he had planned after Biden's weekend remark that he was "absolutely comfortable" with letting gays and lesbians marry."

http://www.cnn.com/2012/05/10/politics/obama-same-sex-marriage/index.html?hpt=hp_c1

They are suppose to follow, obey and defend the Constitution. Even the Highest Law of the Republic can be written, but not with God, the Creator and Owner of us all says:

"Therefore God gave them over in the sinful desires of their hearts to sexual impurity for the degrading of their bodies with one another.

They exchanged the truth about God for a lie, and worshiped and served created things rather than the Creator—who is forever praised. Amen.

Because of this, God gave them over to shameful lusts. Even their women exchanged natural sexual relations for unnatural ones.

In the same way the men also abandoned natural relations with women and were inflamed with lust for one another.

Men committed shameful acts with other men, and received in themselves the due penalty for their error.

Furthermore, just as they did not think it worthwhile to retain the knowledge of God, so God gave them over to a depraved mind, so that they do what ought not to be done. They have become filled with every kind of wickedness, evil, greed and depravity. They are full of envy, murder, strife, deceit and malice. They are gossips, slanderers, God-haters, insolent, arrogant and boastful; they invent ways of doing evil; they disobey their parents;

they have no understanding, no fidelity, no love, no mercy.

Although they know God’s righteous decree that those who do such things deserve death, they not only continue to do these very things but also approve of those who practice them."

Worth reading the whole chapter 1 of Romans.

http://www.examiner.com/article/billy-graham-s-son-accuses-president-of-shaking-his-fist-at-god

"Rev. Franklin Graham, son of Rev. Billy Graham, has issued a response to the president's recent announcement of his support for same-sex marriage. WLOS ABC13 in nearby Asheville, North Carolina, posted the entire statement in full on the WLOS ABC 13 Facebook page. The most emphatic part of Rev. Graham's remarks follows:

In changing his position from that of Senator/candidate Obama, President Obama has, in my view, shaken his fist at the same God who created and defined marriage. It grieves me that our president would now affirm same-sex marriage, though I believe it grieves God even more.

Rev. Billy Graham and his son, Franklin, both were vocal supporters of the controversial legislation that passed in North Carolina Tuesday. With Montreat, North Carolina, being the home of the Billy Graham Ministries, their endorsement of Amendment One on Tuesday helped the state become the 31st state to pass a constitutional amendment establishing the institution of marriage as solely between a man and a woman."