Kara Kennedy, Eleanor Mondale: Political daughters die within hours of each other

In a bizarre coincidence, two daughters of noted American politicians have died within hours of each other ... both at the age of 51.

Kara Kennedy Allen, the daughter of Sen. Ted Kennedy, died suddenly of a suspected heart attack on Friday (Sept. 16) night while at a health club. Kennedy was a lung cancer survivor but her brother, Patrick Kennedy, tells NBC that his sister's cancer treatment "took quite a toll on her and weakened her physically ... her heart gave out."

Eleanor Mondale, daughter of former Vice President Walter Mondale, died at her Minnesota home on Saturday morning following a several years battle with brain cancer.

"Joan and I must report that our wonderful daughter, Eleanor Mondale Poling, after her long and gutsy battle against cancer, went up to heaven last night to be with her angel," her father writes in an email sent out to family and friends.

Kennedy and Mondale were both born in 1960 less than a month apart.