NEW YORK (CBSNewYork/AP) — 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.

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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.”

In a statement, Bill and Hillary Clinton said they were “overjoyed to be grandparents again.”

“We are all over the moon as Chelsea and Marc welcome Charlotte’s little brother to the world and grateful for our many blessings,” the Clintons said. “Chelsea and Aidan are both doing well and enjoying this very special time together.”

Aidan is the second grandchild to be born to a presidential candidate this year.

In March, presumptive Republican nominee Donald Trump’s daughter Ivanka gave birth to her third child, son Theodore James.

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