MINNEAPOLIS — Polls are open for Minnesota’s primary election.

The only statewide race is a seat on the Supreme Court, where Associate Justice Natalie Hudson is the incumbent in a three-party field. Two candidates advance to November.

Ramsey County elections chief Joe Mansky, a former state elections official, estimated 5 percent turnout in his county, the state’s second-most populous. The secretary of state’s office doesn’t predict turnout.

How many voters go to the polls could be a major factor in today’s elections. Candidates in every corner of Minnesota concede that anything can happen when few voters turn out.