Gov. Rick Snyder cannot seek re-election due to Michigan’s term limits law.

Four Republicans and three Democrats seek their party nominations.

The Republicans are Attorney General Bill Schuette, Lt. Gov. Brian Calley, state Sen. Patrick Colbeck and physician Jim Hines.

The Democrats are former state Sen. Gretchen Whitmer, physician Abdul El-Sayed and businessman Shri Thanedar.

Calley, 41, a banker, served on the  in Ionia County Board of Commissioners and served two terms in the state House. Snyder chose him as running mate in 2010.  He has degrees from Michigan State University and Grand Valley State University and attended the Kennedy School of Government at Harvard University.

He and his wife, Sheila, have three children.

Schuette, 64, has served in the U.S. House, the state House and Senate, and on the Michigan Court of Appeals. The Midland native and his wife, Cynthia, have two children.

He holds degrees from Georgetown University and the University of San Fransisco School of Law.

Colbeck, 52, was elected to the state Senate in 2010 to represent northwestern Wayne County. He is a graduate of the University of Michigan and worked in the aerospace industry. He is married and lives in Canton.

Jim Hines and his wife, Martha, live in Saginaw and they raised seven sons and have been missionaries in Africa.

El-Sayed, 34, is the former executive director of the Detroit Department of Health and Wellness Promotion and was a professor of epidemeology at Columbia University. The Detroit native holds degrees from the U-M, Columbia and Oxford University. He is married.

Whitmer, 46, is a former Ingham County Prosecutor and served as minority leader in the state Senate. In addition, she served in the state House. She holds degrees from MSU and the Detroit College of Law at MSU. She and her husband, Marc Mallory, have five children.

Thanedar, 63, was raised in India and became a U.S. citizen in 1988. He holds degress from the University of Bombay and Akron University. He and his wife, Shashi, have two children. He owns Avomeen Analytical Services, an Ann Arbor chemical testing laboratory.