Excerpt:Â A case now before the U.S. Supreme Court proves why the Senate must defeat the United Nations' Law of the Sea Treaty. The oral arguments heard this month by the justices didn't mention the treaty, but the parallels are powerful.The case concerns Jose Medellin, a Mexican national on death row in Texas. Medellin was convicted and sentenced to death after he confessed in 1993 to the rape and murder of two teenage girls in Houston. Long after Medellin had received full due process of the U.S. legal system, in 2003 the Mexican government sued the United States in the International Court of Justice. That is an agency of the United Nations that sits at The Hague in the Netherlands.