One big question raised by IRS political targeting is whether Obama officials or their bureaucratic allies unleashed the power of the administrative state for partisan ends. Now evidence is emerging that officials at another agency, the Federal Election Commission, used their enforcement power as an anti-conservative sword.

The House Ways and Means Committee this week released emails showing that, in 2008 and 2009, the FEC's general counsel staff sought tax information about conservative political groups from Lois Lerner of...