Krugman scores yet another one for the good guys.
When Ronald Reagan cut taxes on rich people, he didn't deny that that was what he was doing. You could agree or disagree with the supply-side economic theory he used to justify his actions, but he didn't pretend that he was increasing the progressivity of the tax system.
The strategy used to sell the Bush tax cut was simply to deny the facts — and to lash out at anyone who tried to point them out. And it's a strategy that, having worked there, is now being applied across the board.