https://chroniclingamerica.loc.gov/lccn/sn85042243/1918-06-24/ed-1/seq-1/

The North Dakota Republican primary is closely fought. The ability of the non-partisan league to hold the German vote is projected to be crucial. The tonics and cures for influenza are appearing more frequently, Humphreys Remedy is prominent.

"Both Factions Confident as Contest Ends," The Bismarck Tribune, Bismarck, North Dakota, June 24, 1918. Page 1, Column 1.