The 1916 election delivered reelection for incumbent President Woodrow Wilson, and this analysis article says that result was in no small part because of “the farm vote.” Of course, farms and agriculture employed a much larger share of the U.S. population at the time, comprising about 31 percent of the labor force compared to just 2 percent today.

So what is the modern-day equivalent of the 1916 “farm vote”? In terms of their demographics — mostly Caucasian, mostly non college education, mostly poor to middle income — the modern-day equivalent of the 1916 “farm vote” is probably the “white working class” which helped propel Donald Trump to victory earlier this month. In the Agri-Pulse Farm and Ranch Poll conducted mere days before the 2016 election, modern-day farmers and ranchers supported Trump 55 percent, compared to only 18 percent for Hillary Clinton.

Farm Vote Shows Breaking of Old Party Lines: West, Having Tasted Power, Will Hold It, Says Political Observer – Next President from West of Missouri River

From November 26, 1916.