popular vote in 2016 and has a loyal following. she and biden go way back. they've worked together for 25 years. as vice president and secretary of state, they met once a week. a private breakfast every tuesday. clinton today recalling their family ties back in scranton, pennsylvania. >> and my grandfather and then my father grew up in a house on diamond avenue, and while the rodhams were living on diamond avenue, the bidens were over on north washington street. >> reporter: today she officially endorsed her old friend. >> i am thrilled to be part of your campaign. >> reporter: without saying her former rival's name, clinton had a clear message for president trump. >> just think of what a difference it would make right now, if we had a president who not only listened to the science, put facts over fiction, but brought us together. think of what it would mean if