Christopher Montgomery on Cameron's big mistake:

What the debates are proving beyond doubt is that there has been an unadmitted consensus in British politics. And that's what has been central to Clegg's success, for only in The Election with No Issues could the Lib Dem leader prosper. That Cameron has not been able to delineate dividing lines sums up his failure in making this his "change election". Surrendering that claim of right to the emptiness of Clegg has been worse than a mistake, it's been embarrassing.

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