The president's edict is unclear,analyst Bill Gertz said.
"[He] issued new guidance which limits the use of nuclear weapons in U.S. security strategy and it states that they will only be used under extreme circumstances without specifying what that is. After we've been nuked by North Korea or Iran, it's not clear," he said.
Gertz, who wrote last month that Obama would call for a reduction in nuclear weapons, said he was also surprised by Obama's revelation that he'll call on nuclear cuts from the Russians.
"Almost as an afterthought the president announced that, well, 'I've done this review, I've determined that we could have one-third nuclear weapons than we plan to have' ... so that brings us down to about 1,000," he said.
"And then, 'Oh, by the way, I intend to do this, to seek these cuts with the Russians.' But the whole set-up for that makes no mention that this is going to be part of negotiations with the Russians. So it's like telling the Russians, 'Hey we're going to cut our arsenal. If you guys want to come along, that'd be nice!'"