Using the Bible to define the laws of marriage is quite antiquated. I feel churches can define the laws of marriage for their own but that the state cannot nor should not exclude rights to those who seek to form a union or to marry. Besides, it's not as if anyone is following all of the edicts in the Holy Book anyway. Right? Consider this list of biblical marriage laws Rob found posted at RuggerJohnnyD's.
The Presidential Prayer Team is currently urging us to: "Pray for the President as he seeks wisdom on how to legally codify the definition of marriage. Pray that it will be according to Biblical principles. With any forces insisting on variant definitions of marriage, pray that God's Word and His standards will be honored by our government."
Any good religious person believes prayer should be balanced by action. So here, in support of the Prayer Team's admirable goals, is a proposed Constitutional Amendment codifying marriage entirely on Biblical principles:
A. Marriage in the United States shall consist of a union between one man and one or more women. (Gen 29:17-28; II Sam 3:2-5.)
B. Marriage shall not impede a man's right to take concubines in addition to his wife or wives. (II Sam 5:13; I Kings 11:3; II Chron 11:21)
C. A marriage shall be considered valid only if the wife is a virgin. If the wife is not a virgin, she shall be executed. (Deut 22:13-21)
D. Marriage between a believer and a nonbeliever shall be forbidden. (Gen 24:3; Num 25:1-9; Ezra 9:12; Neh 10:30)
E. Since marriage is for life, neither this Constitution nor the constitution of any State, nor any state or federal law, shall be construed to permit divorce. (Deut 22:19; Mark 10:9)
F. If a married man dies without children, his brother shall marry the widow. If he refuses to marry his brother's widow or deliberately does not give her children, he shall pay a fine of one shoe and be otherwise punished in a manner to be determined by law. (Gen. 38:6-10; Deut 25:5-10)