Hollande says abstaining would boost Le Pen

French centrist presidential candidate Emmanuel Macron, 2nd left, stands next to Said Bouarram, left, son of Brahim Bouarram, as he pays hommage to Brahim Bouarram, a Moroccan who drowned in 1995 when right-wing extremists threw him from a bridge after a National Front rally, during a ceremony on the banks of the Seine River in Paris, France, Monday, May 1, 2017.

Le Pen herself, who has worked for years to detoxify her party's image, laid a wreath at a memorial to France's deported Jews in Marseille on Sunday, a national day of remembrance.

As the FN pays tribute to the nationalist icon, union leaders and left-wingers have called for a massive turnout for traditional May Day marches through Paris as a show of strength against the far-Right presidential contender.

The Harris Interactive poll places Mr Macron on 61 per cent and Ms Le Pen on 33 per cent.

France's Presidential election heats up as posters of Marine Le Pen and Emmanuel Macron are seen here. She said on Friday that he would make a "strong" leader for France.

The latest polls were conducted prior to the announcement that defeated first round presidential candidate Nicolas Dupont-Aignan, would be Ms Le Pen's prime minister if she wins the presidency.

The presidential candidate denied that her position on the euro has changed.

Said, a chauffeur who supports Macron, said his father was targeted "because he was a foreigner, an Arab".

Le Pen called Macron the candidate of "the caviar left" and "moralizing snobbery" and warned that his pro-business policies wouldn't create jobs but send them overseas and leave French workers hungry. Macron promised to modernize phone and internet connections in rural areas and vigorously defended the European Union as an essential market for French farmers. But his margin over Le Pen could falter.

Both Macron, who launched a new party a year ago, and Le Pen, whose National Front has only two seats in the National Assembly, have faced questions about their ability to build a parliamentary majority. Florian Philippot, a National Front vice president speaking on BFM television, described it as "excellent news" and "a turning point in this campaign". This is why The Economist took the liberty of looking at the Macron and Le Pen presidential battle through the lens of the US electoral system. The first round was held on April 23, with Macron winning with 24.01 percent of the votes and Le Pen coming second with 21.30 percent. Russian hackers have launched numerous cyberattacks against the website of Macron's En marche! movement, and the Kremlin is publicly supporting Le Pen.

Le Pen is also trying to win over those anxious about the anxious about the environment and paid a surprise visit Sunday to a factory whose waste is at the heart of a political debate on the Mediterranean coast.

Elsewhere on the campaign trail, Macron got the backing of former centrist and political heavy-weight, Jean-Louis Borloo.

Marie Le Pen's good showing and the presence of many Eurosceptic candidates showed the extent of anti-EU sentiments which Macron would be fool to ignore in the second round of elections.

Le Pen, who has courted the blue-collar vote, visited the Alteo aluminum plant Sunday in the town of Gardanne, but the event appeared to fall flat.

Le Pen's National Front rejoiced over the alliance with Dupont-Aignan.