French voters were casting ballots on Sunday in a nationwide primary to choose who will be the Socialists' nominee for president, dpa reported. The second-round election is between former education minister Benoit Hamon, 49, and former premier Manuel Valls, 54. The two candidates came out on top of last week's first round of primary voting for the left-wing candidacy, which narrowed down the possibilities from seven candidates. The left-wing winner will face Francois Fillon of the conservative Les Republicains and Marine Le Pen of the far-right National Front, among others, in the two-round presidential election set for April 23 and May 7.