I don’t know, and neither does Natalie Bennett, leader of the UK Greens, who gave one of the worst political interviews of all time this morning. Give it a listen, and squirm as she tries to explain her own housing policy.

Nothing kills credibility like a politician who can’t explain or cost their own policy. As we gear up for this year’s federal election, Canadian politicians should look no further than this car crash to remember why they need to study – and understand – their own policy manifestos.

Photo by Edinburgh Greens / CC BY-NC 2.0 / modified from original