'If' Obama caves? I think Krugman meant 'when':
Think about it. There’s a significant chance that failing to raise the debt limit could provoke a renewed financial crisis — and Republicans would rather take that chance than allow a reduction in tax breaks on corporate jets.
What this says to me is that Obama cannot, must not, concede here. If he does, he’s signaling that the GOP can extract even the most outrageous demands; he’s setting himself up for endless blackmail. A line has to be drawn somewhere; it should have been drawn last fall; but to concede now would effectively mean the end of the presidency.
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