Traditional trade union banners were there, but often overlooked at May Day 2019 in Paris. Instead, grabbing the attention were the Yellow Vests who've been protesting since November and Black Blocs, anti-globalisation activists. What to make of the violence that's part of a broader upheaval? When Emmanuel Macron ran and won as an independent two years ago, he blew away the mainstream centre-left and centre-right blocs. Weakened are all the institutions that stand between Macron and the people.