Holed up mostly out of sight in her Chappaqua, N.Y., home, Clinton is presiding over daily strategy sessions aimed at understanding voter dynamics and the changes wrought by the rise of super PACs and ubiquitous social media, people familiar with her efforts said.

She is also holding policy discussions focused on the economic setbacks facing the middle class and working women and on how to shape solutions that are digestible in a campaign speech.

Clinton appears to be embracing what some Democrats call the “glass-ceiling moment” from 2008, when she poignantly addressed her own failure to break through the gender barrier in her concession speech to Obama.

“She lost a lot of the opportunity for what could have been a lot of energy and passion,” said one Democrat who worked closely with Clinton’s presidential and Senate campaigns. “It’s something people can rally on — it’s a message people can relate to. It’s not a message in itself, but it’s important.”