What Cameron really needs to think about over Christmas is why he wants to be PM

James Forsyth reviews the week in politics

David Cameron is only taking a week off this Christmas. This is a pity, because he is facing a year that would test the stamina of a Spartan. From the moment politics resumes in the New Year, he’ll be in constant campaign mode. Then, if he wins, he’ll be governing a country in crisis; trying to push through unprecedented spending cuts and embarking on nothing less than the reordering of the relationship between the individual, society and the state.