Elsewhere in France, left wing firebrand Jean-Luc Melenchon told a political rally in Chateauroux, central France, he was convinced Le Pen stood no chance of winning the election.
"A chair, a table, or a bench would be elected rather than her in this country," he said.
Le Pen, Melenchon and Macron are all trying to attract voters disillusioned with mainstream parties.
There some similarities between Melenchon's platform and Le Pen's, both skeptical of the EU and globalization but offering very different policies as the former Socialist staunchly criticizes Le Pen's views on immigration.
Melenchon, who has overtaken the official Socialist party candidate Benoit Hamon in election polls and now ranks fourth, on the heels of Fillon, told his supporters: "the wave is rising, my friends"
Melenchon, a political veteran, whose potential election score in polls has risen to as high as 16 percent in the past few days, has ruled out asking Hamon to pull out of the race and join him.