What are the odds that two daughters of prominent Democrat politicians die within a day of each other, both at the age of 51?

Eleanor Mondale Poling and Kara Kennedy Allen, RIP.

I don't mean to be morbid, but things like this often happen in threes.  How old is Amy Carter, and who is guarding her life right now?  Whew...she's only 43, and still very much alive.  She's actually living a much quieter life than her father, which is nice.