Meanwhile, far-left candidate Jean-Luc Melenchon, enjoying a late poll surge, is campaigning on a barge today floating through the canals of Paris.
And conservative candidate Francois Fillon is taking his tough-on-security campaign to the southern French city of Nice, which was scarred by a deadly truck attack last year that killed 86 people.
The race is being watched internationally as an important gauge of populist sentiment, and the outcome is increasingly uncertain just six days before yesterday's first round vote.
The top two vote-getters Sunday of the 11 candidates on the ballot advance to the May 7 presidential runoff.
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The latest polls suggest that Le Pen, Macron, Melenchon and Fillon all have a chance of reaching the runoff and as many as a third of voters remain undecided.
Socialist candidate Benoit Hamon insisted today that he, too, remains a contender.
Macron, a former investment banker well connected in the business world, fended off questions Monday about his elitist image on BFM television.
"The money I earned in my life, I earned it. I have not been given gifts," he said.
He accused rivals of pandering to Russian President Vladimir Putin, and tried to distance himself from Fillon, whose austerity-focused campaign has been damaged by accusations that he misused taxpayer money to pay his wife and children for government jobs that they allegedly did not perform.
Macron and Le Pen are holding their last big rallies in the Paris region later today.