cbs news senior political editor steve chaggaris gave us his insight. >> a lot of fireworks and very explosive and very entertaining and interesting to see how this moves forward affecting ted cruz in iowa. he was ganged up by donald trump and marco rubio and even the moderators. he found himself playing defense all night. he did a pretty decent job paring the tough questions but will it have any effect on his poll numbers? rereins to be seen. then there was a battle for rubio and christie and jeb bush and kayicsich and ben carson. rubio and christie very strong night but done well at these debates and not turned into much in terms of pollinfor them. will it change? interesting to see what happened there. bush, kasich and carson, they really needed a moment, a game changing moment. it didn't happen. i think they have to rely on being out there on the trail and hoping they can change voters minds while they are campaigning. i'm steve chaggaris, cbs news, new york. >>> on the democratic side, hillary clinton campaign is up in arms over a new bernie sanders ad. it suggests that clinton

(steve chaggaris) you had this really heartfelt response from trump, and you don't get a lot of heartfelt responses from trump (ted cruz) "since september the constitution hasn't changed, but the poll numbers have. cruz is running neck and neck with trump in iowa. points for going toe to toe with the billionaire candidate...specific ally on the birther issue: (nancy cordes) ted cruz has a very loyal following//when you go after cruz in a personal way, and you damage someone who they think would make a fine nominee than trump is really on thin ice. the debate also produced fireworks between marco rubio and chris christie: (marco rubio) unfortunately, governor christie has endorsed many of the ideas that barack obama supports (chris christie) two years ago he called me a conservative reformer that new jersey needed that was before he was running against me (rick davis) everyone wrote him off seven months ago //and now he's got a little bit of a pulse in new hampshire//it's going to be very hard for one to take votes from the other. other candidates like jeb bush and ben carson struggled to

cbs news senior political editor steve chaggaris gave us his insight. >> a lot of fireworks and very explosive and very entertaining and interesting to see how this he was ganged up by donald trump and marco rubio and even the moderators. he found himself playing defense all night. he did a pretty decent job paring the tough questions but will it have any effect on his poll numbers? remains to be seen. then there was a battle for third place. rubio and christie and jeb bush and kayicsich and ben carson. rubio and christie very strong night but done well at these debates and not turned into much in terms of polling for them. ll it change? teresting to see what happened ere. bush, kasich and carson, they really needed a moment, a game changing moment. it didn't happen. i think they have to rely on being out there on the trail and hoping they can change voters minds while they are campaigning. i'm steve chaggaris, cbs news, new york. >>> on the democratic side, hillary clinton campaign is up in arms over a new bernie sanders ad. it suggests that clinton wouldn't be tough enough on wall

i'm steve chaggaris, cbs news, new york. >>> on the democratic side, hillary clinton campaign is up in arms over a new bernie sanders ad. it suggests that clinton wouldn't be tough enough on wall street. clinton campaign says sanders is breaking a pledge not to run negative advertising. but last night on "the tonight show" clinton's focus was elsewhere. >> if i'm so fortunate to be the democratic nominee, obviously, i'll run against whoever they nominate, but if it's donald showdown. >> we will talk to bernie sanders about his new ad, wall street reform, and hillary clinton coming up on "cbs this morning." >>> it was sean penn's meeting with mexican drug kingpin joaquin "el chapo" guzman, is part of what led to his capture. just released text messages between guzman and kate del castillo, shows guzman didn't even know who penn was. guzman was captured last friday. >>> coming up on "cbs this morning," charlie rose talks with sean penn about his controversial interview with el chapo. >>> surveillance video of a fatal shooting. of a black teenager by a chicago policeman fails to conclusiv

when the world trade center came down, i saw could have handled more beautifully than new york ( steve chaggaris/ senior political editor/ cbs news) you had this really heartfelt response from trump, and you don't get a lot of heartfelt responses from trump don champion: cruz is running neck and neck with trump in iowa. pundits say he scored major points for going toe to toe with the billionaire candidate...specific ally on the birther issue: (nancy cordes/ cbs news correspondent) when you go after cruz in a personal way, and you damage someone who they think would make a fine nominee than trump is really on thin ice. don champion: the republican contenders have just one more debate...before the iowa caucus. don champion cbs news. ((brian loftus)) the three democratic presidential contenders - hillary clinton, bernie sanders and martin o'malley- will square off in their next debate sunday night - in charleston, south carolina./// sherry how's the weather today? some clouds overnight keeping temps a little milder this morning and now we have some clearing, but more clouds coming in today. .......