Hillsborough County Commissioner Kevin White has another opponent in his re-election bid for next year.
Valerie Goddard, 44, a Democrat and current chairwoman of the Children's Board of Hillsborough County, announced her candidacy Tuesday.
She is the third Democrat to enter the race. Former state Sen. Les Miller has also declared his candidacy.
Goddard is a gubernatorial appointee to the Children's Board, which raises money through a special taxing district to oversee health, education and other programs that help children. She previously served as executive director of Helping Hand Day Nursery, an agency supported by United Way that provides preschool for poor and working class families.
Times researcher Will Gorham contributed to this report.