Chelsea Clinton gives birth to second child
US presidential hopeful Hillary Clinton has become a grandmother for the second time after her daughter gave birth to a boy named Aidan.
Chelsea Clinton, 36, and her hedge fund manager husband Marc Mezvinsky already have a 20-month-old daughter named Charlotte.
Both Charlotte and Aidan were born at Manhattan's Lenox Hill Hospital.
On Twitter, Chelsea Clinton said the couple are "overwhelmed with gratitude and love".
Aidan is the second baby to be born to the child of a presidential candidate this year.
In March, presumptive Republican nominee Donald Trump's daughter Ivanka gave birth to her third child, son Theodore James.