French conservative candidate from the first-round election Nicolas Dupont-Aignan, left, and french far-right presidential candidate Marine Le Pen sing the "Marseillaise", the French national anthem at the end of their meeting, Monday May 1, 2017, in Villepinte, outside Paris. With just six days until a French presidential vote that could define Europe's future, far-right leader Marine Le Pen and centrist Emmanuel Macron are holding high-stakes rallies Monday. (AP Photo/Francois Mori)