MITCHELL, S.D.(WNAX)- South Dakota Congressman Dusty Johnson has been sending out fundraising emails, warning supporters that he may face a primary challenge next year.

Johnson says he hasn’t officially announced he is running again next year.

Johnson says people question why he wants to continue in Congress.

Johnson says he feels he is making a difference.

Representative Taffy Howard of Rapid City has formed a campaign committee but has not formally announced she is seeking the republican nomination for the US House.