Note that both Clinton and Bush the Younger were born in the same year.
As were Carter and Bush Sr.
(and Nixon and Ford, though their differences were less pronounced)
(moving up the list, Grant and Hayes, and John Q. Adams and Andrew Jackson also share birth years).
It's interesting to see how they jump around a bit. The biggest gap in birth years (for any future presidents) is currently 22 (between GWHB/Carter and GWB/Clinton), though there is a slight chance that someone from the 'silent' generation might still eventually win (such as Joe Biden).
The second largest gap was between Ike and Johnson (18 years, and the odds of someone born before 1908 winning the presidency in the future are trivial - so that gap is sure to stand).
I hadn't realized that Carter is slightly younger than GWHB, or that Clinton is slightly younger than GWB.
I wonder if there is a difference in average age at election between the parties? Or even a cluster (tossing out the outliers like Reagan and Kennedy)?
