>> reporter: he broke with the president-elect calling global warming a hoax. >> donald trump is wrong. >> i do not believe child enticement change is a hoax. >> reporter: in south carolina, nikki haley's hearing to be u.s. ambassador to the united nations. she took a tougher line on trump on issues like russia. >> russia is trying to show their muscle. it is what they do. i think we always have to be cautious. i don't think we can trust them. >> manu raju joins us from capitol hill. questions about another of trump's nominees. >> mick mulvaney chosen by donald trump to be his budget director, acknowledging in a questionnaire to the senate he did not pay taxes on a household employee between 2000 and 2004, a transition source telling cnn that that was a babysitter looking a after his triplets after they were born. democrats saying this was enough of a similar tax issue that actually dogged the nominee tom