No one denies that Rachel Reeves, as Labour’s shadow work and pensions secretary, has one of the toughest gigs in town. Fiscally, it seems a Labour government would cap spending on social security. Politically, at a time when highly punitive policies such as the benefit cap attract broad public support, Labour is sensitive to proposing any reform that could be spun as "soft on scroungers". Getting the politics and the economics right will not be easy.
As Londoners start to consider who their next mayor could be, does the New York race give clues for the London campaign?