Lawmakers hammered IRS Commissioner John Koskinen last night at another hearing on the targeting scandal after the agency announced that it had lost a crucial batch of Lois Lerner’s emails.

On June 3, 2011, the chairman of the House Ways and Means Committee sent a letter to the IRS over the apparent targeting. Just 10 days later, Lerner’s computer is said to have crashed, erasing two years of emails.

Krauthammer to O'Reilly: ‘Obama Is Choosing Decline’

From 2009-2011, the IRS was working with an email archiving company, but the company says it doesn’t have the emails either. Charles Krauthammer reacted this morning on Fox and Friends, saying he believes it's clear that the Obama administration is "stonewalling" the IRS investigation by House Republicans.

"What you might need is a special prosecutor, but of course with this president and this attorney general, you'll never see it," said Krauthammer, calling Koskinen a Democratic "party hack" who is doing a "great political service."

Krauthammer says just like with Benghazi and other scandals, the administration's strategy is to drag it out as long as possible, then declare that it's "old news." He pointed back to a discussion on Special Report in which a former Obama spokesman told Bret Baier, "dude, this was two years ago" after questions on Benghazi.

"All they're gonna do is string it out and call it old news. And they've escaped until now," he said, adding that the administration figures the press will eventually lose interest.

He slammed the IRS for displaying "arrogance" in their response to the missing emails, not even showing "contrition" for the failure.

Watch the full interview above.

"Dude, This Was Like Two Years Ago": Fmr. WH Spox to Baier on Benghazi