State Sen. Leland Yee is at it again. He has thrust himself into another dispute where his presence is, frankly, unnecessary, misguided and counter-productive. His latest foray involves a strike by members of the American Federation of State, County and Municipal Employees against the University of California’s system of taxpayer-funded schools. Yee, not surprisingly given his track record, has joined the picket lines to support the public employee union. But there’s a problem. The strike, as currently waged, is illegal. A Superior Court judge ordered AFSCME not to take the action. The union disagrees. Yee, in essence, is backing a move specifically prohibited by a court of law. Further, by taking sides in this matter, he is failing to represent taxpayers who foot the bills for the very same strikers who are flouting the court’s order. Yee, a Democrat whose district includes a portion of San Mateo County, is pandering to a special interest group at the expense of everyone else. His Peninsula constituents would be far better served if he played the role of a constructive mediator in this case. Instead, he has chosen to be a blatant partisan. As this spectacle has proceeded, Yee has damaged his own credibility. He should back off immediately. If his track record of behavior is any guide, the chances of that happening are slim and utterly non-existent.