Rauner has spent all week in Washington, D.C., in anticipation of the ruling, demonstrating his heavy interest in a case that represents one of the biggest wins of his term and one that could help define his legacy. From the steps of the Supreme Court building Wednesday, the governor called the decision "pro-workers and pro-taxpayer," saying it represents a "historic victory for freedom of speech and affiliation for our public-sector employees, and for taxpayers who have to bear the high cost of government."