Plunges in the stock market have taken a toll on the fortunes of the nation's pension funds for retired teachers and other public employees, with retirement systems nationwide reporting losses in the billions of dollars in recent weeks. The losses have worsened already-high unfunded obligations for plans that have promised more than $2 trillion in…

Even as they grapple with budget pressures from a sagging national economy, states are being forced to make tough decisions on how they will cope with an even more severe longterm fiscal concern: a projected price tag pushing $3 trillion to pay the pensions and health insurance of retired teachers and other government employees. Those commitments…