Howard, a Democrat, is the former director of the Pima County Wastewater Management Department and has worked on several political campaigns. He is now a business consultant.
If elected, Howard wants to continue to bring together factions of the Tucson community on regional issues. He also promises to work on modernizing roads and transportation facilities and wants to increase funding for public safety.
He is a high-school graduate.
A state senator since 1990 and the current majority whip, Day is a former teacher and family therapist.
Day, a Republican, has a bachelor's degree in education from Arizona State University and a master's degree in education from the University of Arizona.
If elected, Day promises to work to improve government spending accountability, and wants to see more neighborhood involvement in land-use planning. She also wants to impelement "e-government," which would give the public online access to government information.
Grijalva, a Democrat, is a current Pima County supervisor and also served on the Tucson Unified School District board.
If re-elected, Grijalva promises to work for environmental conservation and protection, and also wants to "re-invest" in existing neighborhoods and communities. He promises that education will be a priority, and wants to improve conditions for adults returning to school.
He has a bachelor's degree in sociology from the University of Arizona.
Lopez, a Republican, is an attorney and a member of the Tucson Unified School District Board.
If elected, she wants to increase funding for the Sheriff's Department and correct what she calls "mismanagement" of health care and of Kino Community Hospital. She also promises to help eliminate financial waste.
Lopez has a bachelor's degree in business administration from the University of Northern Colorado, a master's degree in business administration from North Texas State University and a law degree from the University of Houston.