Tony, 40 years ago the USA was in a position of promoting the NPT and helping Israel violate the NPT. Thus the USA needed Israel to have a position of 'ambiguity' to save American face. After 40 years only nut cases believe that 'ambiguity' and it has NO rational purpose. Indeed, that 'ambiguity' allows you to make specious arguments about a 'double standard.' After 40 years it is indisputable that Israel is a responsible nuclear weapons power. There are few nations in the region who have fear of an unprovoked Israeli attack. Israel has, by it's actions, proven it has a DETERRENT force, not a force created for aggression. Yes, America is under 'pressure' from all sides and from inside, to stop appearing to be a hypocrite, tool, and fool. The best thing that could happen for the USA now is for Israel to stop it's antiquated and self-defeating policy of 'ambiguity' and admit to what everyone knows.
Brazilian head of UN peacekeeping force in Haiti dies of heart attack (Reuters)
from the article: Obama 'strongly' opposes singling out of Israel at nuclear conference