Will ISIS execution change Obama’s strategy in Iraq?

(CNN) – When President Obama spoke Wednesday about the murder of American journalist James Foley, he seemed to also respond to the threat ISIS issued to him over the U.S. airstrikes in Iraq.

"They may claim out of expediency they're at war with the United States or the west, but the fact is they terrorize their neighbors, and offer them nothing but an endless slavery to their empty vision. And the collapse of any definition of civilized behavior. And people like this ultimately fail," Obama said.

"Friends and allies around the world, we share a common security and a common set of values that are rooted in the opposite of what we saw yesterday. And we will continue to confront this hateful terrorism and replace it with a sense of hope and civility," said the President.

But with what will the U.S. confront this hateful terrorism? What's the strategy for defeating ISIS, and is the President doing enough?

The New York Times' Peter Baker joins CNN's "The Lead with Jake Tapper" to discuss.