The first potential high-profile defector, Mr Manuel Valls, who was interior and prime minister under President Francois Hollande and lost in the Socialist Party's primary, said he would like to run for Parliament under Mr Macron's party, saying that "this Socialist Party is dead". "I respect them", Mr Macron said in an address at his campaign headquarters, shown live on television. "I can tell you that right now we are discovering a lot of new friends".
On Monday, the chief of Macron's movement, Richard Ferrand, said it would modify its name to "Republic on the Move" so as to structure itself more like a traditional party.
Mr Macron (39) was an investment banker for Rothschild & Cie before being made France's economy minister in 2014.
Macron's party, En Marche, has promised to put up a candidate for all 577 seats in the Assembly.
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Without that, Mr Macron would be forced to forge alliances, which could mean a watering down of his campaign promises.
The Prime Minister's Office says the two leaders reaffirmed the "rich and diverse bilateral relationship that exists between Canada and France". The first round ends on June 11, with runoff elections held on June 17-18.
The decisive result favoring Macron laid to rest the idea that Le Pen and her party might be gaining enough strength to surprise with an outlier victory, such as occurred with the vote favoring Brexit and the win by President Donald Trump in the United States. And the outcome of that election could dramatically affect how Macron governs the country. Macron has stepped down as head of the movement now that he's president-elect to be replaced by Catherine Barbaroux, who has a management background in both business and government ministries.
The victory of centrist Emmanuel Macron in France's presidential election, in which he beat far-right candidate Marine Le Pen by a particularly wide margin, is a very positive development on a number of fronts.