Pope Francis leads a mass during a pastoral visit on the 50th Social Week of Italian Catholics, at Piazza Unita d'Italia in Trieste, Italy, on Sunday. EPA
Pope Francis leads a mass during a pastoral visit on the 50th Social Week of Italian Catholics, at Piazza Unita d'Italia in Trieste, Italy, on Sunday. EPA

Pope Francis warns against rising wave of populism as France goes to the polls