It is hardly surprising that the United Auto Workers would hold a grudge against Grover Norquist, president of nonprofit Americans for Tax Reform.

The conservative leader was active in the ultimately successful effort to prevent a Chattanooga, Tenn., Volkswagen plant from being unionized. The UAW not only subpoenaed Norquist as part of the effort to get the National Labor Relations Board to overturn the February vote, but it roped in one of his interns, too.