Let me give you two reasons why.
First, Power stated, "The United States of America will not allow Iran to obtain a nuclear weapon. Period."
Does anyone believe that for a minute?
This sounds like another one of the Obama Administraton's red lines.
If the Obama Administration is so keen on not allowing Iran to obtain a nuclear weapon then why is it no longer demanding that Iran stop enriching uranium and dismantle its centrifuges?
Somehow I doubt that Power was in the room when Bret Stephens of The Wall Street Journal so eloquently pointed out at the AIPAC Conference, "We don't allow South Korea to enrich uranium. Why would we allow Iran to do so?"