Chelsea Clinton gives birth to her second child

Chelsea Clinton, daughter of former U.S. President Bill Clinton, attends a launching ceremony of Children’s safe drinking water (CSDW) program in Yangon, Myanmar, Monday, May 27, 2013. Clinton marked the 6 billionth liter of clean water in Myanmar Monday providing water purifier packets to provide safe and clean drinking water. (AP Photo/Khin Maung Win) (The Associated Press)

Presidential hopeful Hillary Clinton is a grandmother twice over.

Chelsea Clinton announced Saturday that she has given birth to her second child, son Aidan.

The 36-year-old daughter of former President Bill Clinton and current presumptive Democratic presidential nominee Hillary Clinton lives in New York.

She and her hedge fund manager husband Marc Mezvinsky have a 20-month-old daughter, Charlotte. Both Charlotte and Aidan were born at Manhattan's Lenox Hill Hospital.

Mezvinsky is the son of former U.S. Rep. Edward Mezvinsky and former U.S. Rep. Marjorie Margolies-Mezvinsky.

On Twitter, Chelsea Clinton said the couple is "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.

"We are overjoyed to be grandparents again," Bill and Hilllary Clinton said in a joint statement. "Chelsea and Aidan are both doing well and enjoying this very special time together."