the iowa caucuses while donald trump still has a commanding lead everywhere else, he s losing badly to ted cruz in the state that gets to vote first and republicans are gunning for him everywhere else. is this the week the republican party came undone? out wez pretty brutal four days ago for trump. reporter: on monday, he announced his most controversial plan yet. donald j. trump is calling for a complete shutdown of muslims entering the united states until our country s representatives can figure out what the helt is going on. reporter: party leaders denounced the proposal as not just wrong but un-american. what was proposed yesterday is not what this party stands for and more importantly, it s for. reporter: every candidate in the race not named trump opposed jeb bush even called trump unhinged. i m not one of these other guys that goes down. i don t go down i go up. do you have a warning for gop leaders? i say, folks, i m sorry i did this to you. report
but we begin with the big moments from last night with jon karl. reporter: going into this debate the democratic race was engulfed with allegations that the sanders campaign stole voter data from the clinton campaign. sanders offered a quick apology. last night s debate started with a surprise a mea culpa from bernie sanders. not only do i apologize to secretary clinton i want to apologize to my spotters. this is not the type of campaign i run. i very much appreciate that comment, bernie, we should move on because i don t think the american people are all that interested in this. reporter: trout the night, foreign policy. if the united states does not leader. the united states is not the policemen of the world, the involved in perpetual warfare in the middle east. should corporate america love hillary clinton? everybody should. will corporate america love a president sanders? i no, i don t think they won t. ceo of large multinationals, they re not going
from rising more than two degrees celsius or 3.6 degrees fahrenheit above preindustrial temperature levels. these are nonbinding and there s no inr enforcement mechanism to punish those who don t keep their promise. secretary of state john kerry, who led the u.s. delegation, compared the effort to moving the biggest battleship in the world. we spoke with him earlier from paris and asked him about the lack of enforcement in the deal. but to get an agreement with 186 nations signing on to a uniform system of required mandatory reporting by which they could be held to a standard and also to be able to have a very ambitious goal and have the flexibility that we have in this agreement to be able to meet those standards did essential. and so i think it s a break away agreement which actually will countries are making judgments about this. the most important thing, john, that really happened today is that the business community of the entire world is receiving a message about coun
christie moved up into fourth place with 11%. the rest of the field is in single digits. during the iowa, it s senator ted cruz who some has taken the lead with 40% support. donald trump is at 31. marco rubio at 12 and ben carson plummeted down to 6%. rest of the field 2% or below. friday we traveled to iowa and met up with marco rubio, we asked him abut his escalating battle ted cruz. senator, what street this debate between you and senator cruz about on immigration? well, ted was much in fact was supporter legalizing people that were in this country illegally, he was during the debate he was after the debate. he made it clear multiple occasions that he was against citizenship but open to legalization. and then for weeks now on campaign trail he s refuses to answer that question until the other night where he said that he did not intend to legalize people. again trying to find himself so the bottom line, there isn t that big a difference between him and i on how to appro
george. it s just 50 days until the iowa caucuses, and while donald trump still has a commanding lead nationally, ted cruz has the lead in the state that gets to vote first and everywhere else. is this the week the republican party came undone? it was pretty brutal four reporter: on monday, he announced his most controvereral plan yet. donald j. trump is calling for a total and complete shutdown of muslims entering the united states until our country s representatives can figure out what the hell is going on. reporter: party leaders denounced the proposal as not just wrong but un-american. what was proposed yesterday for and, more importantly, it s not what this country stands for. reporter: every candidate in the race not named trump opposed jeb bush even called trump unhinged. i m not one of these other guys that goes down. i don t go down, i go up. do you have a warning for gop leaders? i say, folks, you know, i m sorry i did this to you. you got to get