Minnesota House Republicans sued Secretary of State Steve Simon on Thursday in an attempt to force Democratic members back into the chamber, the latest legal challenge in a weekslong political standoff between the two parties.

The Minnesota House began its third deadlocked week due to a Democratic boycott over a power struggle with House Republicans. The state House GOP argues that it can rule with its 67-66 majority after successfully challenging the residency of a Democratic representative.

Democrats in the Minnesota House who have boycotted daily sessions are using tactics that lawmakers elsewhere have tried dozens of times in seeking to thwart their opponents.