Can she erase the memory of her meltdown in 2017? Trailing in the polls, Marine Le Pen has ground to make up when she squares off with Emmanuel Macron in the one and only French presidential election candidates' debate. It's an exercise that matters in a nation that takes its politics seriously. We review what went wrong for the far-right standard-bearer on the night in 2017, whether she has softened her stances – as she claims – and whether the sitting French president can overcome incumbent fatigue or avoid coming across as a know-it-all.