craig bosswell has the latest from the campaign trail. >> donald trump and sarah palin rallied together for the first time since her endorsement of the g.o.p. front-runner tuesday. >> are you ready to stump for trump? i'm here to support the next presiden t ofthe united states of america. >> everybody wanted her endorsement. she said what you are doing, donald, is amazing. it is a movement. and it is a movement. >> trump's stop in oklahoma is the first time he campaigned in the city of tulsa. >> great people. >> he began the day in iowa, where there was another first. trump supporters disappointed to see only trump, not palin. >> it was advised that we have a special guest so we were surprised that, my friends and i were surprised that she wasn't here. >> trump and ted cruz are running neck and neck in iowa. where cruz also took a lit when the state's republican governor came out against the texas senator over ethanol subsidies. >> cruz campaigning in new hampshire turned it into an attack line. >> donald trump promised not only to protect the ethanol mandate, but to expand it. >> on th

craig bosswell has more from iowa. >> reporter: hillary clinton got a big endorsement from gabrielle giffords, a former congressman turned gun rights advocate after she was shot and injured in 2011. >> i want to say these two words. madam president. >> clinton clinging to a narrow lead in iowa says she is best qualified to take office from day one. >> go out and please stand up for me on monday night and if you do, i will stand up and fight for you for the next four years. >> some lined up to hear clinton talk about another issue, her e-mail scandal. >> and these people are undecided voters and disappointed she didn't address the issue. >> what do you think now? >> i think it is a very high level national security issue. >> so at some point, between now and monday, you want to hear more about this. >> i want to hear more about it. sanders says he is staying focused on the issues that impact voters. >> right now, with the election today, i would say it is a toss- up. >> the republicans are also crisscrossing the state for support. >> don't we all like winning? we got to win, okay? >>

craig bosswell has the story from washington, d.c. >> hillary clinton ran away from the south carolina presidential primary. cbs news projects that clinton beat vermont senator bernie sanders by a wide margin. >> thank you so much south carolina. >> exit polls showed 84% of black voters went with clinton and she also dominated among women by nearly 50% and hopes americans give clinton a chance >> the main thing on her mind is to see that the americans have what they need to have. >> with more than 800 delegates up for grabs next tuesday, sanders looked past south carolina and the next few days is on vermont, massachusetts, vermont, oklahoma and colorado. sanders was in texas earlier on saturday where he is fighting an uphill battles in the poll >> if all of you come out to vote and you bring your friends and your neighbors and your co-workers, we are going to win here in texas. >> thank you, alabama. thank you. >> clinton campaigned in alabama before returning to south carolina for her victory celebration. >> we're going to compete for every vote in every state. we're not taking anythi

here's craig bosswell. >> we need to be going after where the threat comes from. and the threat comes from radicalization. >> reporter: today senator ted cruz doubled down on his proposals to patrol muslim neighborhoods in the u.s >> what that looks like is proactive law enforcement. what that looks like is addressing the problem and engaging the problem. >> reporter: in a scathing new york daily news op ed sunday police commissioner bill bratton said it is clear from his comments that senator ted cruz knows absolutely knock about counterterrorism in new york city. deputy commissioner john miller reinforced his boss' message. >> i think when you have people campaigning through fear and using that as leverage, and giving advice to the police to be the cudgel of that fear, that is not the direction american policing should be taking in a democracy. >> reporter: after initially citing donald tump was pressed on whether he would take further action. >> let me ask you right now would you cat gorically rule out the idea of internment camps for american muslims. >> i wou

final approval might not come un >>> as craig bosswell reports, donald trump doubled down on his praise of vladimir puttin'. >> reporter: hillary clinton came out swinging at donald trump the morning after they attended a televised commander- in-chief forum in new york. >> how totally unqualified he is to be president. >> reporter: at the fore know you, she admitted it was a mistake to have a personal e- mail account as secretary of state, about you she defended her handling of top-secret information. >> i communicated about classified material on a wholly separate system. >> reporter: her comments came the same day house democrats released a 2009 e-mail exchange between clinton and former secretary of state colin powell. in it, he described how he had a personal computer hooked up to a private phone line to avoid going through state department servers. donald trump appeared separately where he said u.s. military needs new leadership. >> the generals were reduced to rubble. >> reporter: he went on to praise russian president vladimir putin. >> in that system, he's been a leader far more