Bill and Hillary Clinton have welcomed their second grandchild.
Daughter Chelsea announced today that she and her husband Marc Mezvinsky have had a boy, whom they named Aidan.
"Marc and I are overwhelmed with gratitude and love as we celebrate the birth of our son, Aidan Clinton Mezvinsky," Clinton said via Twitter.
The couple already have a daughter, Charlotte, who was born in 2014.
Hillary Clinton is the presumptive Democratic nominee for the November presidential election in the United States.
Chelsea Clinton is the vice chair of the Clinton Foundation, a non-profit organization founded by her father to improve around the world.
Her husband is an investment banker.
