Rep. Tim Miller announced on Friday that he is throwing his hat in the ring to challenge long-time incumbent Democratic Congressman Collin Peterson for the District 7 House seat in 2018. Miller, 51, a Republican from Prinsburg, is serving his second two-year term as state Representative of District 17A, which includes all of Chippewa and Swift counties, most of Renville County and a small part of Kandiyohi County. Miller’s announced candidacy could create a primary election between himself and Dave Hughes of Karlstad, who lost to Peterson last November, but has said he will challenge Peterson again in 2018. Hughes gave Peterson his closest challenge since 1994. Peterson, 72, from Detroit Lakes, was first elected to the District 7 House seat in 1991. He is the ranking Democrat on the House Committee for Agri­culture. Miller told Forum News Service he assumes Peterson will run again in 2018. A spokesperson for Peterson said he will make his decision about running again early next year. Miller was elected to the state House last fall for his second term by nearly 20 percentage points over DFL-er Andrew Falk. Miller has been a chief proponent in the current legislative session for the re-opening of the Appleton prison and for a new veterans home in Montevideo.