I guess Nixon worked tirelessly for his own impeachment and resigned only out of a sense of self-loathing. What is particularly striking about this latest rationale is that it is so circular — as was Pelosi’s first explanation. First, we could not start an investigation for impeachment without clear evidence of crimes, but we can only confirm evidence of crimes by investigating.

Now, it appears the House cannot start impeachment proceedings unless a president and his party would agree to turn over incriminating evidence. Of course, the use of a president’s authority to conceal or destroy evidence in such an investigation is itself a potentially impeachable offense. Pelosi prevented a John Dean from coming forward by barring the hearing. In past hearings, we have seen former Bush officials implicate the Administration in investigations such a the firing of the US Attorneys. Indeed, if this is Pelosi’s rationale for barring impeachment, why is the House pursuing contempt on these other investigations? It appears that a lack of cooperation does not end matters that the House wants to address.

More...