Explainer: What went wrong for Edwin Poots, the DUP’s shortest-serving leader?

Edwin Poots, who announced his intention to resign as DUP leader on Thursday. File Picture: Brian Lawless/PA Wire
Edwin Poots is facing political oblivion only a month after achieving his career ambition – to lead the party his late father Charlie helped found.
So what went so wrong so quickly for the DUP’s shortest-serving leader?