In this Sept. 27, 2015, file photo, Chelsea Clinton, co-chair of the Clinton Foundation, speaks at the Clinton Global Initiative in New York. Clinton announced Dec. 21 she is expecting a second child in the summer of 2016. AP FILE PHOTO
NEW YORK鈥擶hite House hopeful Hillary Clinton鈥檚 daughter Chelsea announced Monday she is pregnant with her second child.
鈥淣ext summer, Charlotte is going to be a big sister!鈥� Chelsea Clinton posted on Twitter, adding that she felt 鈥渧ery blessed and grateful this holiday season.鈥�
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The birth would come in the middle of the intense battle for the US presidency.
Chelsea鈥檚 mother is the Democratic frontrunner and is widely expected by next summer to be her party鈥檚 nominee, ahead of the November election.
Hillary Clinton routinely invokes her two-year-old grandchild on the campaign trail, assuring audiences that little Charlotte acts as a source of pride and inspiration for her presidential ambitions and efforts to tear down barriers for young people and women.
READ: Chelsea Clinton: It鈥檚 surprising not everyone loves my mom
鈥淲hen I look at my new granddaughter, I think to myself, 鈥榃e are going to do everything we can to make sure she has opportunities in life,'鈥� Clinton said in a September campaign ad.
鈥淵ou should not have to be the grandchild of a former president to know that you can make it in America,鈥� she said.
Chelsea Clinton, 35, is vice chair of the New York-based Clinton Foundation, which was launched in 2001 by her father, the former president Bill Clinton.