The Wisconsin Republican Party got the date of a special election wrong in a mailer sent recently to pro-gun voters in a state Assembly district.

The flyer encourages recipients to vote on June 15. The election is June 12.

Republican Assembly Campaign Committee executive director Jenny Toftness said Friday the date was a mistake and robocalls were made to the recipients as a way to correct the error.

Toftness says the mailer went to voters identified as supporting gun rights.

Republican Jon Plumer is facing Democrat Ann Groves Lloyd in the race for the 42nd Assembly District. The seat is open after the Republican incumbent left to join Gov. Scott Walker's administration.

Democrats hope to flip the seat as a sign of momentum headed into the fall election, while Republicans are looking to hold the seat.