Speaking at a brief news conference in the Hague, President Obama said he's more worried about a nuke being detonated in Manhattan than he is about Russia:

"With respect to Mr. Romney's assertion that Russia is our number one geopolitical foe, the truth of the matter is that America has a whole lot of challenges," said the president.

"Russia is a regional power that is threatening some of its immediate neigbors, not out of strength, but out weakness.

"Ukraine has been a country in which Russia had enormous influence for decades, since the breakup of the Soviet Union. And we have considerable influence on our neighbors. We generally don’t need to invade them in order to have a strong, cooperative relationship with them. The fact that Russia felt compelled to go in militarily and lay bare these violations of international law indicates less influence, not more.

"So my response then continues to be what I believe today, which is: Russia's actions are a problem. They don't pose the number one national security threat to the United States. I continue to be much more concerned when it comes to our security with the prospect of a nuclear weapon going off in Manhattan," said Obama.

Daniel Halper is online editor of The Weekly Standard and author of the forthcoming book Clinton, Inc.: The Audacious Rebuilding of a Political Machine .