Four Democrats – David Benac, Rich Eichholz, George Franklin and Matt Longjohn – are running in the Aug. 7 primary in order to face incumbent Republican Fred Upton, who is running unopposed in the GOP primary.

Benac, of Kalamazoo, is a history professor at Western Michigan University and has been active in various community organizations and governmental boards. The 44-year-old has a bachelor’s degree in history at Michigan State University and a Ph.D. at the University of Missouri.

Eichholz, of New Buffalo Township, is a retired scientist with 30 years of business leadership experience in health care. The 70-year-old holds degrees from the University of Illinois and Cornell University.

Franklin, of Glenn, spent most of his professional career at Kellogg before establishing a government relations firm in 2005. The 66-year-old went on to earn a law degree and worked as a private practice attorney in Washington, D.C. from 1971 to 1976.

Longjohn, of Portage, is a physician and former National Health Officer for YMCA. The 46-year-old received his bachelor’s degree in biology from Kalamazoo College and his M.D. and M.P.H. from Tulane University.