The IRS is spinning a tale of bureaucratic incompetence to explain the vanishing emails from former Tax Exempt Organizations doyenne Lois Lerner and six other IRS employees. We have less faith by the minute that there is an innocent explanation for this failure to cooperate with Congress, but even if true it doesn't matter. The IRS was under a legal obligation to retain the information because of a litigation hold.

In 2009 a pro-Israel group called Z Street applied to the IRS for tax-exempt status. When the process was delayed,...