Will The United Nations Get To Impose International Treaties Here In The US?

You know how everyone calls the conspiracy theorists "idiots" (to put it mildly) when they suggest that the UN is a threat to the US and they could send troops in here?
Well this isn't exactly in the "boots on the ground" category but.....

"The head of the U.N. drug watchdog agency is urging U.S. federal officials to challenge ballot measures in Colorado and Washington that decriminalized possession of small amounts of marijuana for adults 21 and over.
Raymond Yans says the approvals send "a wrong message to the rest of the nation and it sends a wrong message abroad."

http://www.huffingtonpost.com/2012/11/20/raymond-yans-marijuana_n_2166711.html?utm_hp_ref=politics

Now let's see if Attorney General Eric Holder caves to the UN....and if he does...what will Colorado and Washington's reaction be, seeing as how it was their people that voted to pass the measure.