On July 30, 1866, while Sheridan was in Texas, a white mob broke up the state constitutional convention in New Orleans. Thirty-four blacks were killed. Shortly after Sheridan returned, he wired Grant, "The more information I obtain of the affair of the 30th in this city the more revolting it becomes. It was no riot; it was an absolute massacre." In March 1867, with Reconstruction barely started, Sheridan was appointed military governor of the Fifth Military District (Texas and Louisiana). He severely limited voter registration for former Confederates and ruled that only registered voters (including black men) were eligible to serve on juries. Furthermore, an inquiry into the deadly New Orleans riot of 1866 implicated numerous local officials; Sheridan dismissed the mayor of New Orleans, the Louisiana attorney general, and a district judge. He later removed Louisiana Governor James M. Wells, accusing him of being "a political trickster and a dishonest man". He also dismissed Texas Governor James W. Throckmorton, a former Confederate, for being an "impediment to the reconstruction of the State", replacing him with the Republican who had lost to him in the previous election Elisha M. Pease. Sheridan had been feuding with President Andrew Johnson for months over interpretations of the Military Reconstruction Acts and voting rights issues, and within a month of the second firing, the president removed Sheridan, stating to an outraged Gen. Grant that, "His rule has, in fact, been one of absolute tyranny, without references to the principles of our government or the nature of our free institutions."