After the passing of a low tariff in 1857, Justin Morrill pushes a
higher tariff through the American Congress, after many Southern
representatives opposed to such protectionist policies had left
Washington in the build-up to the Civil War.
Citation:
Editors. "Morrill Tariff is passed in USA".
The Literary Encyclopedia. First published 30 December 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=18409, accessed 18 June 2013.]