The Democrats can't ratify a treaty without some Republicans coming to help. The need 66 votes, they have 55.
And suntzu, you're right that I don't know what's in it. If it turns out to be nothing, so be it. But until I know that it is nothing to worry about I'll go ahead and keep paying attention and letting my Senators know exactly what I think of the possibility of allowing the UN to dictate any policy to the United States.