Dozens of people were searched at stations. Rampaging groups last weekend threw cobblestones through Paris storefronts and looted valuables in some of the city's richest neighborhoods.
Since becoming president in January 2017, he has pulled the United States out of the worldwide Paris Agreement on attempting to bring down global temperatures, and torn up a raft of environmental protection laws, saying the U.S. economy needs the boost.
Some places also had separate climate change marches taking place.
Seemingly hoping to recreate the mayhem of last week, protesters again created fiery barricades in the streets and smashed store windows for looting.
Speaking on French TV, he implored: "We will do all we can so that today can be a day without violence, so that the dialogue that we started this week can continue in the best possible circumstances".
The protesters in Paris are demonstrating against a planned fuel cost hike, which the government has since backed away from, and cost of living increases.
Three Associated Press journalists had gas masks and protective goggles confiscated by police despite carrying government-issued press cards.
The new tactics of the police - record numbers of officers deployed, moving quickly to occupy the ground and not hesitating to make arrests - paid off.
Defending the treatment of the children, Interior Minister Christophe Castaner aid: "Over the past few days, the students have been joined by about 100 hooded youths armed with clubs and incendiary devices and determined to pick a fight with police".
"The troublemakers can only be effective when they disguise themselves as yellow vests". You can't get housing anymore.
"We have come here for a peaceful march, not to smash things. We want equality, we want to live, not survive". Officials have pleaded with the demonstrators to stand down.
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Authorities deployed barricade-busting armoured vehicles and 8,000 police in the capital alone. It had pitted a line of security forces, backed by two armored vehicles, against protesters, some lobbing objects and cherry bombs to taunt police. Neither Belgium nor the Netherlands has proposed a hike in fuel tax - the catalyst for the massive and destructive demonstrations in France in recent weeks.
French riot police can be seen arresting some protesters, as they attempt to prevent the violence of last week.
Paris police fired tear gas and water cannons at some violent protesters in clashes on the Champs-Elysees, as the crowd of demonstrators in Paris grew to 8,000 Saturday.
Trump's claims about the situation in France have little connection to what's actually going on in the French capital, and Kirk seems to have gotten his information from a viral video that was actually shot at another right-wing protest - in London.
Dominique Moisi, a foreign policy expert at the Paris-based Institut Montaigne and a former Macron campaign adviser, told CNN the French presidency was not only in crisis but that Europe's future also hung in the balance.
"Tourists are a bit disoriented - no subway, no shopping, no museums. but they seem to take it in their stride", said hotel receptionist Pascal, who declined to give his surname.
Named after the high-visibility safety jackets worn by demonstrators, they began blocking roads, fuel depots and shopping centres around France on November 17 over soaring fuel prices this year.
Many protesters slammed the French media for portraying the protests as led by violent agitators and for siding with Macron's government.
Authorities say the protests have been hijacked by far-right and anarchist elements bent on violence and stirring up social unrest in a direct affront to Mr Macron and the security forces.
Macron's government offered a concession this week when it announced that it would scrap the planned rise in fuel tax.
Four people have died in accidents during the "yellow vest" protests and political leaders from across the spectrum have appealed for calm.