Charles P. Chiniquy (1809-1899) was a Canadian Catholic priest who left the Catholic Church and became a Presbyterian pastor. He is known for his writings and sermons against the Roman Catholic Church. In the period between 1885 and 1899 he was the focus of a great deal of discussion in the United States of America. During the 1880's his conspiracy theories included the claim to have exposed the Jesuits as the assassins of President Abraham Lincoln, and that, if unchecked, the Jesuits could eventually politically rule the United States.