On Thursday, Chelsea Clinton made the happy announcement that she was with child: In a surprise announcement and with her mother, former secretary of state Hillary Rodham Clinton, looking on, Chelsea, 34, said she and husband Marc Mezvinsky are “very excited” and “lucky” to welcome child into their family. “I just hope that I will be as good a mom to my child and hopefully children as my mom was to me,” Chelsea said. A Clinton spokesman later said the baby is due in the fall. The former first daughter’s announcement – at the end of a Clinton Foundation forum promoting girls’ empowerment worldwide at the Lower Eastside Girls Club in Manhattan -- came as a surprise to senior Clinton staffers working the event. That's wonderful news.