The laws discriminating against the colored man, and the numerous instances of cruelty which had been reported to the North, were an important factor in creating and sustaining the common feeling of hostility to the administration. But the New Orleans riots, occurring on July 30, did more to rouse the people of the North, and convince them that stern measures were necessary, than all that had preceded. The massacre stood out vividly against the background of "black laws," and furnished an argument of the most effective kind to be used in the campaign. 2. The riots were of a peculiarly exasperating character. The constitutional convention of 1864, summoned by the proclamation of Major General Banks, had passed resolutions giving the president of the convention power "to reconvoke the convention for any cause." A majority of the members came to the conclusion, in the spring of 1866, that the State constitution should be amended, to place it in harmony with the congressional policy.[125] They determined to have the convention reconvoked for this purpose. The president, Judge E. H. Durell, declined to take advantage of his prerogative, but the delegates, not to be thwarted in this way, proceeded to elect a president _pro tem._ who was willing to issue the desired proclamation. The governor of the State, J. M. Wells, concurred in this rather questionable procedure, and issued a proclamation for an election to fill existing vacancies. It being well understood that negro suffrage was one of the ultimate objects desired by the supporters of the proposed constitutional convention, active hostility to the movement rapidly developed. The proclamation of the president _pro tem._ called for the assembling of the delegates on July 30; and though the only object of this meeting was to determine officially the existing vacancies to be filled in the fall elections, the enemies to the enfranchisement of the freedmen determined to crush the movement in its incipient stage. It is an easy matter to stir up the passions and prejudices of the people, and the indiscreet speeches of certain of the delegates only added to the popular excitement. A negro procession organized in honor of the convention was attacked by a mob in front of Mechanics' Hall, where the convention was in session. The attack was soon extended to the hall itself, the police of the city joining hands with the assailants. When the riot was over nearly two hundred persons were found to have been killed or wounded, the greatest sufferers being the negroes, who were shot down in front of the hall without mercy.