None of these candidates fit the proper age demographic. Both the median and mean age of the last 8 elected presidents is 55. Caroline Kennedy would be the closest candidate to that age in 2016 and she's probably the least likely one of these people to run. With the exception of Sandlin, the rest of these people will be approaching or past 65 in 2016, plus Biden and Perdue will both be over 70. Here's a list of current Democratic Senators and Governors who will be in their 50s on inauguration day in 2017:
Governors:
Chet Culver-IA (50)
Martin O'Malley-MD (53)
Jennifer Granholm-MI (57)
Brad Henry-OK (53)
Tim Kaine-VA (58)
Jack Markell-DE (56)
Senators:
Maria Cantwell-WA (58)
Bob Casey-PA (56)
Amy Klobuchar-MN (56)
Blanche Lincoln-AR (56)
Mark Begich-AK (54)
Mark Pryor-AR (54)
Granted age is not a be all, end all determining factor but the majority of our presidents have been elected in their 50s. Including Obama, only 9 presidents have been elected before turning 50 and only 9 presidents have been elected after turning 60. The remaining 21 elected presidents were elected between the ages of 50-59.
Median age is deceiving, especially because only one of the last 5 presidents (Bush) have fit that criteria. We have just happened to have old (Reagan) and quite young (Obama, Clinton). When you average old and young you get a median that's neither of those (it is 56 for the last 5 presidents).
Because of increasing life expectancy and changing times (i.e. the young, inspirational guy) it is actually more likely for someone to be elected before or after their 50's.
Probably true, especially the part about longer lifespans. But I don't think we can completely ignore the fact that the group of candidates listed in the poll are almost all from the older end of the spectrum and its highly unlikely that all of the candidates will be from that demographic. A more realistic poll would have a better mix of ages instead of including people like Caroline Kennedy and making assumptions about a candidate's electoral future.
Poll
