Labour's Kamala Harris problem

Last night we had the news that President Biden will not contest the election, announcing in a separate statement that he will support his vice president Kamala Harris for the nomination. As endorsements pour in from other notable democrats and donors it looks like it might be nailed-on for her. But what would a Kamala Harris candidacy mean for Labour unity?  Meanwhile, the row over the two child benefit cap continues to swirl. What should we expect this week?  Katy Balls speaks to Fraser Nelson and James Heale.  Produced by Oscar Edmondson.