What does the DUP shakeup mean for Northern Ireland?

<div>Arlene Foster's departure has left the DUP in a difficult place. Unionists could become disaffected if another relative moderate takes over, but younger voters might abandon the party if a hardliner becomes leader. What does this mean for Northern Ireland? Katy Balls speaks to James Forsyth and Denis Staunton, London editor of the <em>Irish Times</em>.</div>