In a column published for Tuesday's editions throughout the bloc, Macron advised voters in the May 23-26 EU parliament elections to reject nationalist parties that "offer nothing," laying down the battle lines for the vote.
Instead, he called on people to support parties who want to strengthen Europe. Macron himself defeated an anti-EU candidate to become modern France's youngest leader, but his popularity at home has dipped since taking office to the strains of the bloc's anthem, "Ode to Joy."
The column is his furthest-reaching attempt to shore up the EU, where nationalist and populist candidates have seen gains, including in neighboring Italy and most recently in the Estonian general election on Sunday.
"Never has Europe been in so much danger," he wrote. He called Brexit a symbol of the crisis plaguing Europe — a "trap" of lies and irresponsibility backed by fake news. "Freedom, protection and progress: we need to build European renewal on these pillars. We can't let nationalists with no solutions exploit people's anger. We can't sleepwalk to a diminished Europe. We can't remain in the routine of business as usual and wishful thinking," he wrote.
He proposed the creation of an agency to protect member states' elections from cyberattacks and other manipulations. He also seeks to ban the financing of EU political parties by foreign powers. To address migration, Macron called for stricter border controls, a common border force, and common asylum rules — measures that have already started being implemented.
Macron also called for Europe to lead the fight against climate change by setting a target of zero carbon dioxide emissions by 2050 and cutting pesticide use in half by 2025. Macron's office said the French president's approach is "legitimate and useful" in opening a European debate without interfering in domestic politics. It added that the French presidency had informed all 28 EU governments ahead of the publication.
The European Commission welcomed Macron's appeal, though it says it has already been working for years on many of the ideas he raised — ranging from border guard and asylum agencies to security and food safety proposals or tackling climate change.
Olaf Scholz, Germany's vice chancellor and finance minister, praised Macron for sending "a determined signal for cohesion in Europe." He told the Funke newspaper that Europe needs to be strong to avoid being pushed around.
In a tweet Tuesday, Finnish Prime Minister Juha Sipila offered support for Macron's call for "security, sustainable growth and ambitious climate policy." Sipila added that people needed to see "the EU that is capable of making decisions and implementing them."
Belgian Prime Minister Charles Michel said he particularly hoped for "a Europe that protects liberty and democracy," according to the agency Belga. But Czech Prime Minister Andrej Babis, Babis, a populist billionaire, appeared skeptical of Macron's plea. "I don't think it goes in the right direction," he told The Associated Press, adding that he believed the EU should focus on issues such as defense and making the bloc's common trading market work better.
Macron on Tuesday launched in Paris a new body where members of intelligence services from across the continent and other experts can exchange theirs views and experiences. He said in a speech this is an example of what can be done in Europe.
The body, called Europe's Intelligence College, notably aims at better fighting of terrorism and cybercrime, but is not involved in operational intelligence exchange. In France, Macron's ratings remain low in popularity polls even if he has appeared to regain a little support in recent weeks as he tries to quell the yellow vest anti-government protest movement.
The polls suggest that Macron's party appears ahead of the far-right National Rally in European Parliament elections. Since he took office in May 2017, Macron has made a point of visiting 19 European countries.
But that has not prevented tensions from breaking out between France and nations where populist parties govern, from Poland and Hungary to Italy. In October, Macron harshly accused Hungarian and Polish leaders of "lying" to their people about the EU.
The Hungarian government of President Viktor Orban said Tuesday: "Macron is a pro-immigration politician, who believes immigration is good. We believe it is bad. "In truth, Macron wants to attack those who are against immigration. That's what this program is about," a written statement said.
France last month saw its most serious diplomatic dispute with Italy since World War II. Paris even recalled its ambassador for a few days to protest perceived Italian meddling in French domestic politics, after Italian Deputy Premier Luigi Di Maio met with French yellow vest activists seeking to run for the European Parliament.
Italy's anti-migrant Interior minister, Matteo Salvini, has repeatedly criticized Macron and said he hoped the French would not back him in the upcoming elections.
Jan M. Olsen contributed to this report from Copenhagen, Denmark.