The Ems telegram had exactly the effect that Bismarck had intended. Once again, public opinion in France was inflamed. "This text produced the effect of a red flag to the Gallic bull," Bismarck later wrote. Gramont, the French foreign minister, declared that he felt "he had just received a slap." The leader of the conservatives in parliament, Thiers, spoke for moderation, arguing that France had won the diplomatic battle and there was no reason for war, but he was drowned out by cries that he was a traitor and a Prussian. Napoleon's new prime minister, Émile Ollivier, declared that France had done all that it could humanly and honourably do to prevent the war, and that he accepted the responsibility "with a light heart". A crowd of 15,000–20,000 persons, carrying flags and patriotic banners, marched through the streets of Paris, demanding war. On 19 July 1870, a declaration of war was sent to the Prussian government.