and we also have to understand that when we listen to people like king abdula of jordan, what he says is that it must be muslim troops on the ground to destroy isis because they have hijacked what is islam is supposed to be. so i think what our job is is to work with muslim countries all over the world, have major powers support them from the air, training troops, providing military equipment. but at the end of the day, i think it will be the muslim nations themselves destroying isis. >> the presidential democratic contest right now, senator, is down to a two-person race between you and secretary clinton. what's main difference between you and secretary clinton that you hope to convey at that cnn town hall later tonight? >> well, there are a lot of differences. you know, wolf, when the middle class this country is disappearing, when we have massive levels of income and wealth inequality, when the 20 wealthiest people in this country now own more wealth than bottom 506%, we need leadership that stands up to the billionaire class and says to them you know what, you guys can't have it al