anniversary of the ratification of the 14th amendment with clemson university history professor orville vernon burton. and sunday at 6:30 p.m. eastern on oral histories, u.s. army veteran dennis haines talks about his experiences, injuries and long recovery during the vietnam war. watch the c-span networks this weekend. >> when i first heard that the president had immediately accepted the offer of kim jong un to meet, my first reaction was, oh, my god, what was he doing. and then i thought, well, nothing else has worked, maybe we a ought to try this because, frankly, maybe they do have an opening. and i would just say the following if i were talking to the folks who are going to have to manage this. the first thing is we do know that there's a north korean pattern, i was the last secretary of state to try to negotiate with the north koreans, with the father, kim jung-il. they get in trouble, sanctions start to bite, they get isolated, and then they go on a charm offensive, they come to the table, they make promises and don't live up to them. or as in happened to us, they actually do live up to a numb