When the IRS targeted liberals
While few are defending the Internal Revenue Service for targeting some 300 conservative groups, there are two critical pieces of context missing from the conventional wisdom on the "scandal." First, at least from what we know so far, the groups were not targeted in a political vendetta -- but rather were executing a makeshift enforcement test (an ugly one, mind you) for IRS employees tasked with separating political groups not allowed to claim tax-exempt status, from bona fide social welfare organizations. Employees are given almost zero official guidance on how to do that, so they went after Tea Party groups because those seemed like they might be political. Keep in mind, the commissioner of the IRS at the time was a Bush appointee.
The second is that while this is the first time this kind of thing has become a national scandal, it's not the first time such activity has occurred.