This IRS scandal is, as expected, getting most interesting. People are asking questions about who knew what when '� a variant of Sen. Howard Baker's famous question at the Watergate hearings 40 years ago: 'What did the president know, and when did he know it?' 'I first learned about it,' President Obama said of the IRS story on May 13, 'from the same news reports that I think most people learned about this. I think it was on Friday.' That would be May 10. Which means, except for the acting deputy assistant gardener, he was maybe the last person in the White House to hear about it. In fact, it increasingly appears that just about everyone knew about the Treasury Department inspector general's report, which was released May 14, on the Internal Revenue Service's targeting of tea party groups for special scrutiny of their applications for tax-exempt status. But under the administration's 'Don't tell Dad' policy, no one bothe...