Source for Popular Vote data: Wisconsin Secretary of State. Wisconsin Blue Book, 1937, Wisconsin Secretary of State (http://digicoll.library.wisc.edu/cgi-bin/WI/WI-idx?type=turn&id=WI.WIBlueBk1937&entity=WI.WIBlueBk1937.p0442&isize=XL) (accessed 18 May 2010)