biden has lost 13 points in two months. it appears that most of that support he lost shifted over to warren and sanders. look at the math, they picked up the arithmetic. senator kamala harris a mystery to me has stayed exactly at 8 despite her very impressive performances. she doesn't change. be we're going to have to wait and see if the poll is an outlier. a margin of error of 5.7, a big margin of error. for more i'm joined now by expert steve kornacki of msnbc and danielle moodie-mills. sirius xm host. i want your thoughts -- no, your thought first. >> okay. >> what's going on with biden? >> i think that biden is doing what he has done in the past two times that he has run for president. he comes in very strong. he has hard name recognition. people are very excited by him. in this particular election, he is the security blanket, he's the nostalgia candidate, he reminds us of a forgotten time.