but warren is to forgive in $50,000 for anyone in house holds making less than six figures a year. they insist it s a friendly fight. i think bernie is terrific. we were friends long before i ever got involved in politics. elizabeth is a friend of mine. i think she s running a good campaign. yet just beneath the surface, tensions are rising. some sanders supporters have never forgiven warren. i m here today because i m with her. yes, her. reporter: for endorsing hillary clinton in 2016 before sanders dropped out. and sanders is making clear he feels foot steps. suddenly painting warren as more of an establishment candidate. after the moderate democratic group third way recently said they prefer her candidacy to his. at this third way meeting, i was called, quote, an existential threat to the democratic party. reporter: sanders made that
argument the theme of a weekend speech at the south carolina democratic convention. they prefer senator warren to you. i don t care who they prefer. that s not what i m talking about. i m talking about having a democratic party that represents the working families of this country. reporter: many warren admirers we talk to say they like sanders but believe warren can win and favor her softer touch. it s not so it s not as upsetting to other people. reporter: but sanders loyalists say his ideas are driving the 2020 conversation and only he can bring sweeping change. so people have to decide do they want the original or do they want copies? reporter: so he s the original? he s the original. reporter: jeff zeleny, cnn, miami. they will not be on stage together, but that enter play over two nights will be fascinating. 9/11 responders got a face-to-face with the majority leader. how did it go? two of them join us next. (vo) the insurance institute for highway safety
democratic primary is between elizabeth warren and bernie sanders. it s a battle promising warren s big ideas. this is our chance in 2020. our chance to dream big, to fight hard, and to win. reporter: and sanders pledge for a revolution. our job is to complete the revolution we began. but this time around sanders has considerable competition in his pursuit of progressive voters. warren is not only stealing a share of his thunder, but attracting some sanders admirers who see her as the fresh face of the left. one who they believe may be more electable. as they prepare for the first democratic debate this week in miami, their policies are similar. with calls to implement medicare for all. but there are differences like the respected plans to relieve student debt. sanders would wipe out all outstanding debt in the country.
this heart wrenching photo captures the damage central americans face as they flee violence and poverty. oscar martinez and his daughter valeria drowned crossing the rio grande. he crossed successfully with his daughter then left her on the shore to go back to get his wife. she followed him. he grabbed her before they were both swept away. the children who make it to the u.s. border in detention centers, professor warren binford is part of the alarm about their conditions. she is a law professor and joins us now. professor, thank you very much for being here on this really heart breaking morning as we all try to just make sense of this photo that we re seeing. what was your reaction when you saw this father and daughter who were killed? well, i immediately thought
most of those children could have left on thursday when we did. however, the government has not released these children to their families. and they need to get these children there. you bring us such an important perspective that we wouldn t have without you having gone to these detention centers. professor, thank you very much for all the information. thank you. we re just hours away from the first democratic primary debate. what s the one thing candidates should say or maybe shouldn t? the key lessons from history, a reality check is next. my experience with usaa has been excellent. they really appreciate the military family and it really shows. with all that usaa offers why go with anybody else? we know their rates are good, we know that they re always going to take care of us. it was an instant savings and i should have changed a long time ago. it was funny because when we would call