Theoretically. But not with the deception the GOP has demonstrated they are capable of using in order to bolster the positions of the UN and the State Dept.
Read how the UN Desertification Treaty was deliberately slipped through the Senate in the wee hours of the morning with no recorded vote by the GOP majority. Original story from World Net Daily, posted here on FR. See posts #8 and 9:
New U.N. treaty ratified quietly, http://www.freerepublic.com/focus/f-news/1288691/posts
That's frightening.