In February 2014, Howorth announced her candidacy for the California's 26th Senate District seat. The seat was held by Senator Ted Lieu, who ran for Congress to replace Congressman Henry Waxman. Howorth lost in the primary election.
She was re-elected to the Manhattan Beach City Council in March 2015. In July of 2016, she served on the Rules Committee of the Democratic National Convention as a Hillary Clinton appointee. She was appointed by Los Angeles County Supervisor Janice Hahn to the Commission on Children and Families. Howorth is also a Director of the Clean Power Alliance of Southern California.
Howorth was born in Coshocton, Ohio in 1964. She attended Ohio University (1982-1986) where she earned a Bachelor of Science degree in Telecommunication, with minors in French and Political Science. Her activities and societies in college included Chi Omega and WOUB-TV. She is a 21-year resident of Manhattan Beach, where she lives with her husband Mark and two sons Ari and Jack.
After college graduation she began a career as a professional photo editor. She began working at Stock Boston (1986-1988) as a photo researcher. In 1988 Howorth, became a photo librarian and editor for WGBH-TV Public Television in Boston, Massachusetts. She then became the original photo editor for Wired Magazine in 1993.
Before joining the Manhattan Beach School Board in 2003, Howorth was School Site Council President, PTSA Vice President, and Cultural Arts Chair, and Legislative Representative for her sons' school, Robinson Elementary. In 2003, she was elected to the Manhattan Beach School Board where she served 8 years and was President of the board in 2005 and 2008. In 2011, she was elected to the Manhattan Beach City Council and served a one-year term as Manhattan Beach Mayor.