Chelsea Clinton Expecting Second Child

(CBSNews) Chelsea Clinton is pregnant with her second child, the former first daughter revealed on Twitter on Monday.

Clinton's mom, Democratic presidential candidate Hillary Clinton, tweeted Monday that she and former President Bill Clinton are excited to welcome their second grandchild.

The former president tweeted that Christmas came early.

Clinton, 35, gave birth to her first child, Charlotte Clinton Mezvinsky, in September 2014. Clinton married Marc Mezvinsky in 2010.

Hillary Clinton frequently references her new title of grandmother on the campaign trail. In September, she said her granddaughter Charlotte can call her whatever she wants.

"I want to wait to see what she does call me," Clinton told ABC News. "Grandma's fine. Madame President's fine. Whatever she chooses."

Before the former secretary of state launched her 2016 presidential bid earlier this year, there was speculation that being a new grandmother would weigh heavily on her decision to run again.

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