Police are shown in videos charging against protesters and using tear gas to clear areas.
In a speech, the French president suggested new laws to hold notable people accountable for spreading misinformation online.
Around half of En Marche's candidates are political newcomers, with the average age under 50.
The head of the NSA has said he sees no letup in Russia's attempts to interfere in other countries' elections.
Macron said Le Pen was a "high priestess of fear" who would start a civil war, while Le Pen said her rival was a "darling of the elite."
The National Front leader, who is running in second place in the presidential race according to opinion polls, repeated her complaint that French banks were refusing to lend her money.
Macron ranked first ahead of far right leader Marine le Pen.
Florian Philippot helped give the National Front a softer face—but a younger Le Pen is approaching on the far-right.
The normalization of the National Front's politics means the party is seen as an inevitable contender.
Tactical moves by Socialists hands power to Sarkozy's conservatives.