Political parties from across the French spectrum have joined in accusing left-wing leader Jean-Luc Mélenchon of violence. The dispute has become part of the presidential campaign, with Mélenchon facing criticism from different directions over the disorder. The report says the political spectrum fears he could reach the second round of the presidential election against Marine Le Pen. That prospect has sharpened arguments about who bears responsibility for the clashes and who gains politically from them. Curfews have been declared again in Paris, Lyon and Marseille as authorities struggle to contain the security situation. The campaign rhetoric has not settled responsibility for specific incidents. Meanwhile, the curfews show that the government still faces serious disorder while the verbal attacks intensify.