affect pending class action suits against costco, goldman sachs and other corporate giants. karen travers has details on this and reaction. good morning, karen. >> reporter: good morning, peggy, good morning, daniel. the plaintiffs in this case, six female walmart employees, claim they can prove the retail giant discriminated against all its female employees. the supreme court was not convinced. it's a blockbuster unanimous ruling. the supreme court ruled that one of the largest class action lawsuits in history could not go forward against retail giant walmart. in a statement, walmart said the court made the right decision. the plaintiffs' claims were worlds away from showing a company-wide discriminatory pay and promotion policy. but on one critical issue there was disagreement. the court split 5-4 on ideological lines and ruled there were too many women in too many different jobs to group together into one lawsuit. >> the courthouse door will be closed on millions of women and others who face discrimination when they try to vindicate their rights in court.