AP:

A group that opposes gay marriage asked the U.S. Supreme Court on Wednesday to take up a challenge to Nevada's ban on same sex unions.

The Coalition for the Protection of Marriage said the case crystalizes the fundamental question of whether the legal definition of marriage should be changed from a man and a woman to the union of any two people.

The coalition filed documents seeking what is known as a writ of certiorari that asks the Supreme Court to take the case before it can be considered by the 9th U.S. Circuit Court of Appeals in San Francisco.

... "The fundamental marriage issue is whether ... the legal definition of marriage (should) be changed from the union of a man and a woman to the union of any two persons," the coalition filing said.

In its 127-page filing, the coalition called the Nevada case the clearest among several gay marriage cases the high court could consider because it hinges on that "fundamental" question and isn't encumbered by side issues.

"This case has developed most comprehensively and thoroughly the societal interests justifying preservation of marriage's man-woman meaning," the document said.