As a rule of thumb, the Temperance movement was strongest where there were fewer Catholics and more Protestants, particularly evangelical Protestants. Southern Baptists advocated abstinence, as did such demoninations as Seventh Day Adventists,
For example, Methodists were strongly in favor of temperance. This is why Evanston, a suburb of Chicago, was basically dry up until the late 20th century. It had a large and powerful Methodist population. This was in part due to its being home of a large (one-time) Methodist university, Northwestern University, and a seminary.
The Temperance movement was also associated with some progressive ideas, such as a living wage, an 8 hour work day, and women's sufferage.
Where was the temperance movement strongest? Was one or both nations going to have prohibition? On one hand I see alcohol being illegally shipped in, but at the same time a strong soft drink industry could achieve a lasting dominance.