Under state law, the House must have 68 members present — a majority of the total 134 seats, the justices wrote.

Minnesota’s top court ruled that Republicans had overstepped their authority by conducting business in the Legislature even as Democrats boycotted the session.

The Minnesota Supreme Court on Friday sided with Democrats in their interpretation of quorum question at the center of a power dispute in the state House, ruling that the 68 members need to be present to meet that threshold.