Opponents of photo identification requirements for voting often couch their arguments in terms of “voter suppression.” While those claims are dubious at best, John Fund‘s latest column at National Review Online examines a real case of voter suppression.

The 2012 election season was filled with angry cries of “voter suppression,” almost all of them regarding attempts by states to require voter ID and otherwise improve ballot integrity. Bill Clinton warned that “there has never been — in my lifetime, since we got rid of the poll tax and all the other Jim Crow burdens on voting — the determined effort to limit the franchise that we see today.” Democratic-party chairwoman Debbie Wasserman Schultz said “photo-ID laws, we think, are very similar to a poll tax.”

All of this proved to be twaddle. An August 2012 Washington Post poll showed nearly two-thirds of African-Americans and Hispanics backing photo ID. The Census Bureau has found that the rate of voter turnout for blacks exceeded that of whites for the first time in the 2012 election.

But it now turns out there may have suppression of the vote after all. “It looks like a lot of tea-party groups were less active or never got off the ground because of the IRS actions,” Wisconsin governor Scott Walker told me. “Sure seems like people were discouraged by it.”

Indeed, several conservative groups I talked with said they were directly impacted by having their non-profit status delayed by either IRS inaction or burdensome and intrusive questioning. At least two donors told me they didn’t contribute to True the Vote, a group formed to combat voter fraud, because after three years of waiting the group still didn’t have its status granted at the time of the 2012 election. (While many of the targeted tea-party groups were seeking to become 501(c)(4)s, donations to which are not tax-deductible, True the Vote sought to become a 501(c)(3).) This week, True the Vote sued the IRS in federal court, asking a judge to enjoin the agency from targeting anyone in the future.