abc's liz kreutz reports. >> reporter: i'm race heating up and hopefuling facing voters in a cnn town hall. >> just to be clear you are going to raise taxes to do this. raise -- we will raise tax, yes, we will, but also let us be clear, chris, we may raise taxes, but we are also going to eliminate private health insurance premiums for individuals and for business. >> reporter: he also didn't hold back when asked about his opponent. >> this calls for a standing up response. >> okay. >> what do i think? let me give you a couple of examples. i voted against the war in iraq. hillary clinton voted for the war in iraq. >> reporter: later hillary clinton animated, energetic confronted with questions over her honesty and her e-mails. >> i've heard from quite a few people my age that they think you're dishonest. >> you know, look, i've been around a long time. people virginia thrown all kinds of things at me and i can't keep up with it. i just keep going forward. they fall by the wayside. they come up with these outlandish things and make these charges, i just keep going forward because there'

abc's own liz kreutz was there and joins from us des moines. liz, morning. >> reporter: reena and kendis good morning. we're now less than one week away till the iowa caucus aer a day crisscrossing the state campaigning, the three democratic presidential candates convened right here overnight in iowa, the race heating up >> leave me alone here. >> reporter: the democratic presidential hopefuls facing voters in a cnn town hall just seven days before the caucus. bernie sanders fielding questions on his health care pl and the economy. >> but just to be clear, you are going to raise taxes to dothis. >> yes, we will raise -- we will raise taxes. yes, we will. but also let us be clear, chris. weay raise taxes, but we are also going to eliminate private health insurance premiums for individuals and for business. >> he also didn't hold back when asked about his opponent. >> now, this calls for a standing up response. >> okay. >> what do i think? let me give you a couple of examples. the truth is that the most significant vote and issue regarding foreign