In a year it is wrestling with an out-of-control budget, a war going badly, and one impasse on immigration and another on its own ethics, the Senate is taking time out to debate altering the U.S. Constitution by adding the Marriage Protection Amendment. The amendment is widely predicted to fall short of the needed votes to amend the Constitution for only the 23rd time in its 217-year history _ 13th if you omit the original 10, the Bill of Rights _ and well it should. At its gravest level, the amendment would make a significant incursion into federalism and state's...