duncan. stay u no sleepies. >>> welcome back. when former vice president joe biden announced he was running for president again,is wife dr. jill. she' wtten a new memoir as well. "where the light enters: building a family, discovering myself." good to see you. >> good morning. >> we'll get to the book in a minute, but of course we know rur husband isning for president. >> yes. >> you've been here before. were you gung ho for this decision or did you have to be convinced? >> yeah, i was gung ho. i felt this country feelsdi so ded and joe knows how to bring people together. he's a convener. you know? so i'm hoping he unite this country. and i want to thank you for celebrating teachers. because as a teacher myself, -- you know, i really appreciate what you're doing. >> well, you'll love our next half hour. i watched very carefully his t. campaign announcement. he said he didn't think the country could survive eight years of president trump. he said he will alter the character of this nation. do you see it that way? do you think that president trump is a threat to the verye essenc of this country? >> i do. i do. and i think we saw