Chelsea Clinton announces birth of second child
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Chelsea Clinton, daughter of presumptive Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonSinema invokes McCain in Senate acceptance speech Sinema defeats McSally in Arizona Senate race Hillicon Valley: Social media struggles with new forms of misinformation | US, Russia decline to join pledge on fighting cybercrimes | Trump hits Comcast after antitrust complaint | Zuckerberg pressed to testify before global panel MORE and former President Bill ClintonWilliam (Bill) Jefferson ClintonOn The Money: Dems mark Trump tax returns as key part of agenda | Waters defends planned probe of Trump finances after GOP backlash | Reports: Trump mulls replacing Commerce chief Ross by end of year Dems mark Trump tax returns as key part of agenda After the hype: A ‘softer’ Trump, collegial Pelosi MORE, announced Saturday the birth of her second child, Aidan Clinton Mezvinsky.

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Bill and Hillary Clinton are thrilled to be grandparents again, they said in a statement.

"We are all over the moon as Chelsea and Marc welcome Charlotte's little brother to the world and grateful for our many blessings," their statement read. "Chelsea and Aidan are both doing well and enjoying this very special time together."

Clinton frequently mentions the joys of being a grandmother on the campaign trail and cited the birth of her first grandchild, Charlotte, as her inspiration for seeking the presidency again. 

"Having this wonderful little person in your life makes you think about the future in a whole new way," Clinton told "Us Weekly" in April. "Being a grandmother is the most amazing experience."

Chelsea gave birth to Charlotte in 2014.