Hillary Aides Worried about Possible Biden Candidacy

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Aside from statements about final decision deadlines, is there any evidence, any at all, that Biden is considering a run?  Organization?  Advisor recruitment?  Exploratory activity? I ask because I really don't know.  If Biden ran, I'd welcome it.  But between all kinds of relevant political factors and the recent, terribly sad death of his son, I just don't see him running. 

Hillary aides, to be perfectly honest, should be worried about her giving over-the-moon dumb answers to questions like the one she gave to a recent query about Keystone.  There is still plenty of time to polish her act of course.  But seriously, if she keeps giving answers like that to legit policy questions, she doesn't deserve to be nominated.