Emmanuel Macron is on the verge of becoming the youngest president in French history. If he is successful in defeating his far-right opponent, Marine Le Pen, it will also be the first time since 1974 that France elects a centrist president. But even in its early days, Macron's presidency will face a huge test: his En Marche! movement is still very much in its infancy and it is unclear whether it will morph into a full-blown political party before June's legislative elections. If it doesn't, one of the main questions that voters will have is whether Macron will be able to govern in the absence of a clear parliamentary majority. Since the term of the presidency was cut from seven to five years in 2002, so that presidential and legislative elections coincide, the president’s party has usually been able to count on a majority of seats in the National Assembly to swiftly pass legislation.