MADISON, Wis. — Democrat Caleb Frostman's win in the race for an open state Senate seat could give his party a legitimate shot at finally flipping the chamber in November.

Republicans have controlled both houses of the Legislature since 2011. The GOP went into Tuesday's special election in the 1st Senate District with an 18-14 Senate majority.

Frostman defeated Andre Jacque to take the seat, narrowing the GOP majority to 18-15. That means Democrats now need to capture only two seats in November.

Two GOP seats will be open and Democrats think they can flip three other seats.

If Democrats take the chamber they could have a say in redrawing legislative boundaries. The U.S. Supreme Court is currently weighing whether Republicans unfairly gerrymandered districts in 2011.