MILWAUKEE, Wis. — Getting a Milwaukee County board member to threaten with a government audit apparently isn’t enough intimidation.

Now, Service Employees International Union Healthcare Wisconsin is taking matters into its own hands.

The labor group is organizing a protest on Aug. 14 near Supportive Homecare Options Inc. in Wauwatosa, partly because business owner Sally Sprenger has repeatedly refused SEIU’s demands to force all of her employees to join the union.