In a tweet Sunday, Trump says he's looking forward to working with Macron, but did not immediately extend an invitation for him to visit the White House.
New Democracy leader Kyriakos Mitsotakis said Macron's victory was a "good day for Europe".
His newly renamed grassroots movement, "Republique en Marche" (Republic on the Move), which was founded only 13 months ago, will finally reveal the vast majority of the 577 candidates who will stand in parliamentary elections in June.
Macron's party said the leaked documents dealt with the normal operations of his campaign. However, the election did mark the largest number of votes her party has ever won.
According to di Borgo, Le Pen showed herself to be "a very bad candidate during the May 3 debates against Macron", as she went from 42 percent of prospective votes before the debates to the 33.9 that she ended up gaining on Sunday.
There can be no doubt that the French ruling class swung behind investment banker Macron, who has never held elected office before, when it became clear the establishment party candidates had no chance.
Manuel Valls, who was interior and prime minister under President Francois Hollande and lost in the Socialist Party's primary, told RTL that he'd like to run for parliament under Macron's party, saying that "this Socialist Party is dead".More news: Judge rules no discrimination, then sends him off with empty pockets
His announcement appeared to take the president-elect's camp by surprise.
Ms Le Pen hailed a "historic result" but admitted the need for "profound transformation" before the parliamentary elections.
Macron said his task was to rebuild European unity, fix the French economy and ensure security against extremist threats.
Le Pen, 48, had portrayed the ballot as a contest between Macron and the "globalists" - in favour of open trade, immigration and shared sovereignty - and her "patriotic" vision of strong borders and national identities.
This time, neither the so-called Socialist Party nor the Republicans, the two parties that have dominated French politics for decades, made it to the second round. She said she would stay to lead an opposition of "patriots" against "globalists".
As well as deciding on the crucial figure of his first prime minister - which will send a powerful signal about his intentions - Macron has also had to grapple this week with the case of a problematic former colleague.