In 1834 he was elected first mayor of Toronto, then incorporated under its present name, as a consequence of the public sympathy aroused in his favour by his several expulsions. Previous to the election of 1835, in which he was returned to the assembly, he made one of the most serious blunders of his life, in the publication of a letter from Mr. Joseph Hume, the famous Radical, whose acquaintance he had made while in England. Mr. Hume emphatically stated his opinion that "a crisis was fast approaching in the affairs of Canada which would terminate in independence and freedom from the baneful domination of the mother country, and the tyrannical conduct of a small and despicable faction in the colony." The official class availed themselves of this egregious blunder to excite the indignation of the Loyalist population against Mr. Mackenzie and other Reformers, many of whom, like the Baldwins and Perrys, disavowed all sympathy with such language. Mr. Mackenzie's motive was really to insult Mr. Ryerson, with whom he had quarrelled. Mr. Ryerson in the _Christian Guardian_, organ of the Methodists, had attacked Mr. Hume as a person unfit to present petitions from the Liberals of Canada, since he had opposed the measure for the emancipation of slaves in the West Indies, and had consequently alienated the confidence and sympathy of the best part of the nation. Mr. Hume then wrote the letter in question, in which he also stated that he "never knew a more worthless hypocrite or so base a man as Mr. Ryerson proved himself to be." Mr. Mackenzie in this way incurred the wrath of a wily clergyman and religious journalist who exercised much influence over the Methodists, and at the same time fell under the ban of all people who were deeply attached to the British connection. Moderate Reformers now looked doubtfully on Mackenzie, whose principal supporters were Dr. Duncombe, Samuel Lount, Peter Matthews, and other men who took an active part in the insurrection of 1837. In the session of 1835 a committee of grievances, appointed on the motion of Mr. Mackenzie himself, reported in favour of a system of responsible government, an elective legislative council, the appointment of civil governors, a diminution of the patronage exercised by the crown, the independence of the legislature, and other reforms declared to be in the interest of good government. The report was temperately expressed, and created some effect for a time in England, but the colonial minister could not yet be induced to move in the direction of positive reform in the restrictive system of colonial government.