I think I understand where you are coming from ACC but dont think it applies...In others words DOMA doesnt have to be in relation to the constitution, In other words a law cant be unconstitutional ...but they pretty much make laws all the time..and if they are not constitutional then they dont fly....here is a partial list from the recent past...as we can see many of them are just laws.
DOMA is essentially just a definition of marriage.
If you start reading below we can ask the same question with number 2 for instance "December 9, 1991: High Performance Computing and Communication Act of 1991"
What provision is the constitution does it support...it doesn't..but that doesn't make it constitutional.
So my question to you is...what part of the constitution does doma violate and how.
Your argument is different than the standard argument...the standard argument is that it is discrimination....which almost holds water..but not quite.
http://en.wikipedia.org/wiki/List_of_United_States_federal_legislation,_1901-2001
102nd United States Congress
November 21, 1991: Civil Rights Act of 1991, Pub.L. 102-166, 105 Stat. 1071
December 9, 1991: High Performance Computing and Communication Act of 1991, Pub.L. 102-194
December 18, 1991: Intermodal Surface Transportation Efficiency Act, Pub.L. 102-240
October 9, 1992: Chinese Student Protection Act of 1992, Pub.L. 102-404, 106 Stat. 1969
October 23, 1992: Weapons of Mass Destruction Control Act, Pub.L. 102-484 (div. A, title XV), 106 Stat. 2567
October 31, 1992: Water Resources Development Act of 1992, Pub.L. 102-580
103rd United States Congress
February 5, 1993: Family and Medical Leave Act, Pub.L. 103-3, 107 Stat. 6
May 20, 1993: National Voter Registration Act of 1993, Pub.L. 103-31, 107 Stat. 77
August 10, 1993: Omnibus Budget Reconciliation Act of 1993, Pub.L. 103-66, 107 Stat. 312
November 16, 1993: Religious Freedom Restoration Act, Pub.L. 103-141, 107 Stat. 1488
November 30, 1993: Brady Handgun Violence Prevention Act (Brady Bill), Pub.L. 103-159, title I, 107 Stat. 1536
November 30, 1993: National Defense Authorization Act for Fiscal Year 1994, Pub.L. 103-160, 107 Stat. 1670 (including elements of Don't ask, don't tell)
December 8, 1993: North American Free Trade Agreement Implementation Act, Pub.L. 103-182, 107 Stat. 2057
May 26, 1994: Freedom of Access to Clinic Entrances Act, Pub.L. 103-259, 108 Stat. 694
September 13, 1994: Violent Crime Control and Law Enforcement Act, Pub.L. 103-322, 108 Stat. 1796 (including the Violence Against Women Act)
104th United States Congress
January 23, 1995: Congressional Accountability Act, Pub.L. 104-1, 109 Stat. 3
November 28, 1995: National Highway Designation Act, Pub.L. 104-59, 109 Stat. 568
December 19, 1995: Lobbying Disclosure Act, Pub.L. 104-65, 109 Stat. 691
December 22, 1995: Private Securities Litigation Reform Act, Pub.L. 104-67, 109 Stat. 737
February 8, 1996: Telecommunications Act of 1996, Pub.L. 104-104, 110 Stat. 56 (including the Communications Decency Act)
March 12, 1996: Cuban Liberty and Democratic Solidarity Act of 1996 (Helms-Burton Act), Pub.L. 104-114, 110 Stat. 785
April 9, 1996: Line Item Veto Act, Pub.L. 104-130, 110 Stat. 1200
April 24, 1996: Antiterrorism and Effective Death Penalty Act, Pub.L. 104-132, 110 Stat. 1214
July 30, 1996: Taxpayer Bill of Rights 2, Pub.L. 104-168, 110 Stat. 1452
August 3, 1996: National Gambling Impact Study Commission Act, Pub.L. 104-169, 110 Stat. 1482
August 20, 1996: Small Business Job Protection Act, Pub.L. 104-188, 110 Stat. 1755
August 21, 1996: Health Insurance Portability and Accountability Act (HIPAA), Pub.L. 104-191, 110 Stat. 1936
August 22, 1996: Personal Responsibility and Work Opportunity Act (Welfare Reform Act), Pub.L. 104-193, 110 Stat. 2105
September 21, 1996: Defense of Marriage Act (DOMA), Pub.L. 104-199, 110 Stat. 2419
September 30, 1996: Domestic Violence Offender Gun Ban, Pub.L. 104-208, 110 Stat. 3001
October 1, 1996: Emerson Good Samaritan Food Donation Act, Pub.L. 104-210, 110 Stat. 3011
October 12, 1996: Water Resources Development Act of 1996, Pub.L. 104-303, 110 Stat. 3658
105th United States Congress
August 5, 1997: Balanced Budget Act of 1997, Pub.L. 105-33, 111 Stat. 251
August 5, 1997: Taxpayer Relief Act of 1997, Pub.L. 105-34, 111 Stat. 788
June 9, 1998: Transportation Equity Act for the 21st Century, Pub.L. 105-178, 112 Stat. 107
July 22, 1998: Taxpayer Bill of Rights III, Pub.L. 105-206, title III, 112 Stat. 726
August 7, 1998: Workforce Investment Act, Pub.L. 105-220, 112 Stat. 936
October 21, 1998: Child Online Privacy Protection Act, Pub.L. 105-277, div. C, title XIV, 112 Stat. 2681
October 27, 1998: Sonny Bono Copyright Term Extension Act, Pub.L. 105-298, title I, 112 Stat. 2827
October 28, 1998: Digital Millennium Copyright Act, Pub.L. 105-304, 112 Stat. 2860 (including Online Copyright Infringement Liability Limitation Act)
October 31, 1998: Iraq Liberation Act, Pub.L. 105-338, 112 Stat. 3178
106th United States Congress
May 21, 1999: Emergency Supplemental Appropriations Act (Kosovo operations), Pub.L. 106-31, 113 Stat. 57
August 17, 1999: Water Resources Development Act of 1999, Pub.L. 106-53
November 12, 1999: Gramm-Leach-Bliley Financial Services Modernization Act, Pub.L. 106-102, 113 Stat. 1338
November 29, 1999: American Inventors Protection Act, Pub.L. 106-113, 113 Stat. 1536 (including Anticybersquatting Consumer Protection Act)
March 14, 2000: Iran Nonproliferation Act of 2000, Pub.L. 106-178, 114 Stat. 38
April 5, 2000: Wendell H. Ford Aviation Investment and Reform Act for the 21st Century, Pub.L. 106-181, 114 Stat. 61
May 18, 2000: African Growth and Opportunity Act, Pub.L. 106-200, 114 Stat. 251
June 30, 2000: Electronic Signatures in Global and National Commerce Act, Pub.L. 106-229, 114 Stat. 464
August 7, 2000: Oceans Act, Pub.L. 106-256, 114 Stat. 644
September 22, 2000: Religious Land Use and Institutionalized Persons Act, Pub.L. 106-274, 114 Stat. 803
October 17, 2000: Children's Health Act, Pub.L. 106-310, 114 Stat. 1101
October 30, 2000: Robert T. Stafford Disaster Relief and Emergency Assistance Act, Pub.L. 106-390, 114 Stat. 1552
December 7, 2000: Shark Finning Prohibition Act, Pub.L. 106-557, 114 Stat. 2771
December 11, 2000: Water Resources Development Act of 2000, Pub.L. 106-541, 114 Stat. 2572
December 21, 2000: Commodity Futures Modernization Act of 2000, Pub.L. 106-554, 114 Stat. 2763A (as part of the Consolidated Appropriations Act, 2001)