The 2011 legislation approved strict limitations on collective bargaining for unions In a 5-2 decision, the court ruled that public employees in Wisconsin do not have a constitutional right to collective bargain.
The controversial law sparked months of protests and led to Gov. Walker's recall.
In response to the ruling, Gov. Walker said, "Act 10 has saved Wisconsin taxpayers more than $3 billion. Today's ruling is a victory for those hard-working taxpayers."
A spokesman for Democratic challenger Mary Burke's Campaign said, "Mary supports the right of workers to collectively bargain, and believes that the concessions on health care and pension were fair, but should have been reached through the collective bargaining process.
She knows that collective bargaining rights don't stand in the way of effective, accountable government, and that working together is the best way to address the challenges we face."
Copyright Copyright 2014 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.