La République En Marche!, formerly known as En Marche!, is a social liberal political party in France that was founded on 6 April 2016 by former Socialist Party of France and independent politician Emmanuel Macron, who had once served as Minister of the Economy and Finance. Macron was a supporter of the European Union and sought to protect the interests of big business in politics, attracting supporters from both the left and right. Macron's goal was to create a transpartisan organization that was united in its progressivism, and he was able to make it to the second round of the 2017 presidential election after passing the first round on 23 April. On 7 May 2017, Macron won a vast majority of regions with around 65% of the vote, winning in a landslide to become France's youngest president at the age of 39. Many Democratic Movement of France and Socialist Party of France politicians defected to En Marche! after the election, giving the party 24/577 National Assembly seats and 1/74 European Parliament seats before the legislative elections had even begun. In the legislative elections, the party swept the National Assembly, especially at the expense of the Socialist Party; the party won 310/577 National Assembly seats, reducing the Socialists to just 30 seats.