How the NRA is fighting the U.N. small arms treaty

now i just read this article in the Washington post about how the NRA will be fighting the U.N. small arms treaty and how the Obama administration opposed it at first but now is starting to support it after a second draft was submitted but also says that the treaty would be void if it violates any current laws or is unconstitutional but yet Obama and Feinstein wants to ban "assault weapons" yes that makes sense right.....

 here is the full story