The Bank of the United States' charter is due to be renewed, and Taney advises Jackson to let it expire, which is exactly what Jackson wants to hear. Two consecutive Secretaries of the Treasury, Lewis cLane and William J. Duane, support the bank and refuse to remove federal money from it. Jackson finally appoints Taney as Secretary of the Treasury because he trusts Taney to help him kill the bank. Taney will obligingly do so.
-- Joanne Williams
Carl Brent Swisher, Roger B. Taney (New York: The Macmillan Company, 1935), 160-255.
Sandra F. VanBurkleo and Bonnie Speck, "Taney, Roger Brooke," American National Biography Online, http://www.anb.org/articles/11/11-00834.html.