ask your doctor if opdivo is right for you. bristol-myers squibb thanks the patients and physicians who participated in the opdivo clinical trial. >> o'donnell: on w wnesday, vice president joe biden n epped back campaign. standing in the white house rose garden, flanked by his wife, dr. jill biden, and president obama, the vice president seemed reluctant, even regretful, as he passed up a third try for the presidency. >> biden: unfortunately, i believe we're out of time, the time necessary to mount a winning campaign for the nomination. but while i will not be a candidate, i will not be silent. >> o'donnell: and he certainly wasn't saturday afternoon, when we joined the vice president and dr. biden at their official residence on the grounds of the naval observatory for his first television interview since the announcement. it's been a big week. how are you feeling about this decision? >> biden: ah, good. family, it's the right decision for us. >> o'donnell: : it that you think k u couldn't win or thth you didn't want to run? >