Obama promises not to use nukes even in self-defense against a chemical or biological attack

President Obama has indirectly invited our enemies to attack us with chemical or biological weapons by promising to not use nuclear weapons against nonnuclear states that are in compliance with the Nuclear Non-Proliferation Treaty. Obama has overruled his own Defense Secretaries initial position on nuclear weapon strategy. Apparently, he believes we possess some 'uber' weaponry his Defense Secretary hasn't been told about.

Those threats, Mr. Obama argued, could be deterred with “a series of graded options,” a combination of old and newly designed conventional weapons.

The NYT reported:

To set an example, the new strategy renounces the development of any new nuclear weapons, overruling the initial position of his own defense secretary.