>> weijian jiang in washington. weijian, thank you. >>> the secret service is investigating a physical altercation between one of its agents and a journalist at a trump rally in virginia. as black lives matter protesters were being taken from the rally, "time" magazine photographer christopher morris left the designated press area to take pictures. the agent confronted morris and morris admits cursing at him. the agent grabbed morris by the neck and put him in a choke hold and then slammed him to the ground. later morris touched the agent morris was led away by security, but says he will not press charges. >>> coming up later on on "cbs this morning," we'll discuss the implications with cbs political analyst john dickerson and our political team will bring you election results at 10:00, 9:00 central. >>> well, apple won a legal battle against government efforts to force it to break this involves a drug case in new york city. the judge ruled apple is not to have to. this is not related to the case regarding the san be

weijian chang jiang is in washington with the latest. >> she will not clinch the nominations but momentum can carry them through and for a fractured gop that means a greater divide between republicans who will and will not back trump. on the eve of super tuesday trump predicted a win in georgia. >> we're going to win, win, win. >> the latest poll shows the front-runner lead both marco rubio has tried to halt it hammering him for days most recently for failing to disavow former kkk leader david duke who announced his support. >> there's no room in the conservative movement for the kkk or david duke or anyone who will not condemn them. >> senator cruz is banking on a win in his home state to keep his campaign alive. >> what we will see i would think is a chunk of delegates and everyone else far behind. >> they expect hillary clinton to pick up far more delegates than bernie sanders which could make it possible for her to lose the nomination. >> what we need to do together is make america whole again. >> sanders made his final pitch in massachusetts where more than 100 delegates are on the l