A deeply divided Supreme Court dealt a major blow to the nation's public employee unions Wednesday that likely will result in a loss of money, members and political muscle. About 5 million workers could be affected by the ruling, which overrules the court's 1977 decision in Abood v. Detroit Board of Education — those who pay dues or "fair-share" fees to unions in 23 states where public employees can be forced to contribute. Workers in 27 states cannot be forced to join or pay unions.