Could it propel extreme right-wing candidate Marine Le Pen to victory? Or will it mobilize disaffected voters to get to the polls for Sunday's first round of voting to keep an anti-immigrant, anti-EU candidate in check?
Cartoonists from across Europe have already weighed in. Here's our selection of their best work.
This week's cartoon. pic.twitter.com/lqJ3VpzvGx— Moshe Gilula (@MosheGilula) April 21, 2017