In 2008 and again in 2012 she was a co-chair of the New Hampshire Committee to elect Barack Obama President of the United States, a superdelegate to the 2008 Democratic National Convention in Denver, and was a member of the United States Electoral College in 2008, when she cast one of New Hampshire's four electoral votes for Barack Obama and Joe Biden.

[citation needed] Fuller Clark, daughter of environmental activist and former Maine legislator Marion Fuller Brown, earned a master's degree in art history from Boston University, and an undergraduate degree from Mills College.

Since 1973, she and her husband, Dr. Geoffrey Clark, have lived in the city of Portsmouth where they raised their three children, Caleb, Nathaniel, and Anna.

[citation needed] On November 2, 2010, Republicans reclaimed control of both chambers of the state legislature.

On November 6, 2012, Clark was returned to the New Hampshire Senate from the newly-redrawn 21st District, which includes her hometown of Portsmouth.