former fbi agent bobby ciccone from los angeles. president obama defending his view that climate change is a greater threat to americans than terrorism. president obama told cbs news that, quote, climate change could lead to a rise in violent extremism. i have no idea what that was, our apologies. and the president stunned just about everyone in one of his extemporaneous lectures declaring that you can't build a border wall to stop climate change. i know. let me repeat the president's sentence, you can't build a border wall to stop climate change. make of the president's statement what you will, i can't make sense of it at all. and turning to the quantifiable, a new poll shows the republican front-runner is indeed the front-runner and by a wide margin. donald trump has a 20-point lead against his next closest rival. this is his biggest lead yet in the republican race, not bad considering nearly every major strategist and political savant declared trump to be unserious or saying he would fade after the first months of his candidacy.

i want to share some insight, john, we gathered from former fbi agent, bobby ciccone. >> looking like it was a workplace dispute between an employee and somebody they worked with. that supported by the early fact in the case, where the police got on to the focus area, the area of focus, they went to. when they engaged the suv, that is probably the result of somebody that was at the original attack, naming this gentleman. saying this guy left the party earlier. he was escorted out. there was a dispute between co-workers. this guy returned and the shooting ensued. >> and i hear what you're saying. but the thing i think a lot of people are trying to reconcile with that theory, and again, we haven't had anything confirmed at this stage, is the involvement of the female who was in the suv. now, of course, again, we don't know if farook was in that shoot-out that resulted in the death of two individuals. but a woman was in that suv. a woman was shot and killed. how do you reconcile that? >> my educated guess was that was him in the suv. this could have been a wife or a girlfriend that may h