but they still need democrats with republicans holding 52 seats and democrats 48. most things require 60 votes to pass. >> you can't flinch, you can't blink. you have to look it right in the eye. analyze it, learn from it. >> reporter: the trump cabinet will be one early test. rex tillerson and defense secretary nominee james mattis. the new congress came with one old touch. >> we're having a conversation. >> reporter: vice president joe biden in his formal role, swearing in one final class of senators. it's one of his last official acts after 44 years in washington. >> anybody else want to be sworn in? >> jeff zeleny joins us. i understand president-elect and vice president elect pence will