Demmer graduated from Hayfield High School in Hayfield, then attended the University of Minnesota, earning his Bachelor of Arts in agricultural business administration.
A Republican, he is also a local business owner, manager, and consultant. He is a former 11-year board member and treasurer of the Hayfield School District. Demmer was first elected in 2002, and was re-elected in 2004, 2006 and 2008.
He also served on the Finance subcommittees for the K-12 Education Finance Division and the Transportation Finance and Policy Division.
He is currently an assistant minority leader. 2008
In 2008, he unsuccessfully sought the Republican Party"s endorsement to run for the United States House of Representatives in Minnesota"s 1st congressional district.
In December 2009, he announced that he would again seek the Republican Party"s endorsement for the congressional seat in 2010, challenging incumbent Democrat Tim Walz. On April 17, 2010, he received the Grand Old Party endorsement.
Also running are Independence Party nominee Steven Wilson and Party Free candidate Lars Johnson.
Republican Party of Minnesota, Republican Party.
He was a member of the House"s K-12 Education Policy and Oversight Committee, the Taxes Committee, and the Ways and Means Committee.
Married Kathy Demmer. 3 children.