goner. today i am a united states senator. reporter: warren using her life story to accompany her came s mantra. and i got a plan for that. reporter: tieing those experiences to pitch the policy plans central to her campaign. but biden s approach is a bit nod to loss. an element of his life that plays out over and over on the campaign trail. how many of you have lost somebody to cancer or a terminal disease. reporter: biden growing emotional in iowa as he talked about personal caregivers. there is nobody, nobody more important to you than that person and you would do anything to help you with a bed pan to when they get really scared, you know. hold their hand. reporter: delaware congressman lisa blunt rochester is among those to connect with biden over grief after her