andrea canning (voiceover): mary's sister spoke to lieutenant robert nelson.tective with the oneida county sheriff's office. robert nelson: she asked if we would get involved in the investigation to determine how mary got this in her system. do you feel that this is something that would fall under your purview? yes. at this point, we were like, well, we need to get a hold of the me's office to see exactly, you know, what they have. what did they rule as the cause of death? andrea canning (voiceover): the detective learned there was nothing in mary's medical history to explain why she'd be taking colchicine. andrea canning: so why would she have this poison, this drug in her system? that they didn't know. that's when they started looking at different things. she took all these supplements. they looked at supplement contamination. andrea canning (voiceover): mary's son, adam, and katie gathered her supplements to have them sent for testing. anything there? never. we finally got the test back from there and nothing. - negative? - negative. andrea canning (voiceov

david: he was a congressman who was appointed by nelson rockefeller to succeed the assassinated robert. kennedy and he became a senator. is that right? roger: that's correct, 1968. david: your family moved to washington? roger: no, we moved there in 1959 when i was born so he could serve in congress. david: people may not remember this, but your father was very famous because he was appointed as a moderate republican and then he opposed the war in vietnam under richard nixon. that became very difficult for him politically because many republicans at that time wanted to support richard nixon and didn't feel that a republican who opposed the vietnam war was a good republican. was that difficult for you? were you proud of what your father had done at the time? many people who were younger were against the vietnam war. roger: i couldn't be prouder of my father and the courage it took for him to do something that he knew was the right thing to do. it wasn't popular. and he knew at the time that he would likely lose his seat and lose the election. but he did it anyhow. and i think when we we

roberts has laid out. joining me now is the leader of one of those such organizations, janay nelson, president and director can you talk about in this moment how important it is to maintain an independent judiciary with everything else that is going on within government in america? >> it is of the greatest importance, and i'm so glad that we have an opportunity to talk about this. happy new year to you, charles. as we approach this second trump administration, we are reminded of the key role that the federal judiciary played in its first administration, where trump tried to enact new laws and push congress to adopt legislation. he tried to legislate by fiat through executive orders. and most of the challenges to his actions that were excessive, that were overreach, were in fact either overturned or somehow narrowed by the supreme court or lower federal courts. he only prevailed in about 22% of the nearly 250 challenges to some of his actions in his first term. and that means that our courts, our state and federal courts, mostly federal in that instance, played a significant role in restraining his overreac

robert. >> hi! i'm glad i got through. um, i have two questions. is it a myth or fact that one of the president says tried to poison and the second question is when nelsondela visited from south africa, did he stay in one of the white house guest rooms? that's my two questions. thank you. is it a myth or a fact that presidents at some point in history there was an attempted poisoning? >> i'm not aware of that happening in the white house. very special care is taken to everything the president will consume or be offered. so -- >> there's a taster. >> it would be very surprising to me that anything would be within the realm of possibility there. >> do you know about nelson mandela's visit? >> i don't know. that's a question that i don't know the answer to. one of the things i love about my job is we're an educational organization and we teach and tell these stories, but i also like to learn. i could work here the rest of my life, susan and learn something new every single day so that gives me something to go and find out now. >> andrew is in baltimore watching us. you're on, andrew. >> hi. my grandfather was a fairly e respected stone mason back in the da