but has a progressive and Dem. history along with adjacent Logan County and much of WV in the modern past. Because of the mining industry in Mingo and SW WV, union organizing began there in the early 1900s and became 'Bloody' with the largest ever US labor uprising, 'The Battle of Blair Mt.' in 1921 followed by the Matewan Massacre of pro-union Sheriff Sid Hatfield. Warren kicked off her 2020 campaign in Lawrence, Mass., location of one of the most important labor strikes in American history, the 1912 Bread & Roses textile workers movement.
Wiki, Mingo County Politics. The youngest of West Virginias 55 counties, Mingo was created entirely from powerfully secessionist Logan County. Consequently, for the 110 years following its creation, Mingo County was powerfully Democratic, voting for Walter Mondale who came within 3,819 votes of losing all 50 states by a two-to-one margin in 1984, and voting Republican only for William Howard Taft in 1908, Herbert Hoover in 1928 due to powerful anti-Catholic sentiment against Al Smith, and Richard Nixon against the left-wing George McGovern in 1972.
Like all of West Virginia, since 2000 a combination of declining unionization and differences with the Democratic Partys liberal views on social issues has produced a dramatic swing to the Republican Party. In 2016, this historically heavily Democratic county voted only eight percentage points less Republican than historically Unionist and rock-ribbed GOP Grant County. https://en.wikipedia.org/wiki/Mingo_County,_West_Virginia