The labor union movement is in deep trouble. Only 6 percent of private-sector employees are union members. Voters are beginning to realize, thanks to governors like Chris Christie of New Jersey and Scott Walker of Wisconsin, that public-sector unions have negotiated unsustainable levels of pensions and benefits -- and that public-sector unions are a mechanism for involuntary transfers of money from taxpayers to the Democratic Party. Who's to blame for the unions' plight? I blame Frederick W. Tay...