WBEZ brings you fact-based news and information. Sign up for our newsletters to stay up to date on the stories that matter.Union leaders representing some 10 million state government workers like police officers and teachers are no doubt a bit nervous these days with the U.S. Supreme Court likely to rule against public unions in a case brought by California teachers. At issue is whether state government workers who choose not to join a union can nonetheless be required to pay a share of union dues to cover the cost of negotiating contracts. So if the high court does rule in favor of the plaintiff, what will this mean going forward for those unions? President of American Federation of Teachers, Randi Weingarten joins us shares her thoughts.