HOWARD KURTZ: No special prosecutor for IRS scandal: Here’s the back story.

When the IRS inspector general found improper targeting of conservative groups in the Cincinnati office, Obama called the conduct “inexcusable.” Last month, though, he told Bill O’Reilly there was not a “smidgen of corruption” in the IRS.

The problem is the same one that gave birth to the post-Watergate law. If Justice finds no higher-ups were involved in the IRS misconduct, would that finding have credibility with the public? Would an outside probe have more credibility, or spiral out of control?

With the independent counsel law dead and buried, we’re not likely to find out.

Obama’s fine with that.