Tory morale has been a bit shaken by these polls; Cameron could do with a decisive win at PMQs tomorrow to gee up the Parliamentary party. But turning these numbers around is, I suspect, going to require some policies that show us what David Cameron’s irreducible core is. Oddly enough, I don’t think these policies have to be particularly popular but they have to show the electorate that Cameron stands for something, that he isn’t just another say anything to win politician. Picking a fight on offering substantial recognition to marriage in the tax system might actually be a good strategy for Cameron in these circumstances. It would show that there are some things he will stand up for whatever the risks.