During World War I, it was not unusual for some groups to question other groups' loyalty or patriotism. The temperance movement was involved in the national conversations about loyalty, and Prohibitionists and anti-Prohibitionists accused the opposite side of being disloyal to the United States. For people in favor of Prohibition, the production of beer took resources away from the war effort. German brewers, including those in Minnesota, were viewed with suspicion. 

This document shows one argument from the people against Prohibition. They argue that the Anti-Saloon League, the most powerful Prohibition organization in the country, did not purchase Liberty Bonds to support the war effort or provide free advertising space in their newspaper for Liberty Loan ads. The Minnesota Trades Union League created this poster to encourage Minnesotans to vote against Prohibition, which they call an "un-American program."