Hillary Clinton phoned into The O'Reilly Factor to talk about the terror attack in Nice, France, saying "we've got to do more to understand that this is a war against terrorist groups the radical jihadist groups." But she said it's a different kind of war that must be waged smartly.

"One of my priorities is to launch an intelligence surge," she said. "We still do not have enough intelligence cooperation between our agencies and those in other countries, including in Europe, and we need to have a focal point...in Nato."

Clinton said "it is a dream of ISIS" to bring more U.S. ground troops into the fight, saying that Kurdish and Iraqi fighters have been able to "do a much better job."

Watch the interview above.