Minnesota House Democrats pledged Monday to boycott the start of the legislative session if Republicans attempt to use their temporary 67-66 majority to take control of the chamber and elect GOP Leader Lisa Demuth as speaker.

A major power dispute has erupted at the Minnesota State Capitol, jeopardizing the start of the legislative session next week.

Democrats have also voiced concern that Republicans could refuse to seat Rep.-elect Brad Tabke, a Democrat from Shakopee, who won by 14 votes. Those results are facing a legal challenge after Scott County officials said 20 ballots were accidentally discarded.

Minnesota could see one of the most contested starts to a legislative session when state lawmakers meet in St. Paul next Tuesday. The DFL is threatening to skip the start of the session if there’s no power-sharing agreement with Republicans.