File photo taken on Nov. 11, 2021 shows French President Emmanuel Macron arriving to attend the opening ceremony of the 4th Paris Peace Forum at la Grande Halle de la Villette in Paris, France. Photo:Xinhua

French President Emmanuel Macron, riding high in the polls ahead of elections in April, is to reveal his program for a second term on Thursday in his first major campaign event.

The 44-year-old delayed declaring his intention to seek reelection to the last possible moment and is now under pressure to engage with voters and rivals ahead of polls on April 10.

If he becomes the first French president to be reelected in 20 years in April, the former investment banker is expected to focus on deepening his pro-business domestic reforms and accelerating his vision for a more powerful European Union.

But few specific details about his program have been revealed. Thursday's event in Paris, which will include a lengthy press conference, is "an important exercise to show that he is addressing the questions and criticism of him, and that he's therefore really entering the campaign," a minister told AFP on condition of anonymity. Rivals across the political spectrum, who have struggled to make an impact in recent weeks amid the focus on Russia-Ukraine crisis, had been calling on Macron to declare his candidacy since the turn of the year. "The president wants to be reelected without ever really having been a candidate, without a campaign, without a debate, without a competition between ideas," the head of the Senate, Gerard Larcher, said on Tuesday. "If there isn't a campaign, then there will be questions about the legitimacy of the winner," the opposition figure from the Republicans party told Le Figaro newspaper.

Republicans presidential candidate Valerie Pecresse has claimed that "when you run away from debating, it's probably because you're scared."

Macron has brushed aside the criticism, but has also declined to take part in televised head-to-head debates ahead of the first round, like his predecessors as president.

"Election campaigns when a president is running for reelection are always a bit unusual, that's normal," Macron said on Tuesday as he visited a center for Ukrainian refugees outside Paris. The most recent voter surveys suggest that Macron has gained between 5.0 and 6.0 points over February and could be on course to win the first round of the election with a score of around 30 percent, which would be a higher margin of victory than in 2017.

Veteran far-right leader Marine le Pen is running in second place, with a score of around 18 percent, a poll of polls by the Politico website suggests. She is trailed by three candidates on around 11-12 percent: Pecresse, far-right former TV pundit Eric Zemmour and hard-left campaigner Jean-Luc Melenchon, who appears to be gaining momentum.