Question:  The 1919 Mississippi gubernatorial election Incumbent Democrat was a master of what?

Passages:
The 1935 Mississippi gubernatorial election took place on November 5, 1935, in order to elect the Governor of Mississippi.  Incumbent Democrat Martin S. Conner was term-limited, and could not run for reelection to a second term.  As was common at the time, the Democratic candidate ran unopposed in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election. The 1927 Mississippi gubernatorial election took place on November 8, 1927, in order to elect the Governor of Mississippi.  Incumbent Democrat Dennis Murphree, as he had not served a full term, was eligible for and ran for election.  As was common at the time, the Democratic candidate ran unopposed in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election. The 1931 Mississippi gubernatorial election took place on November 3, 1931, in order to elect the Governor of Mississippi.  Incumbent Democrat Theodore G. Bilbo was term-limited, and could not run for reelection to a second term.  As was common at the time, the Democratic candidate ran unopposed in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election. The 1923 Mississippi gubernatorial election took place on November 6, 1923, in order to elect the Governor of Mississippi.  Incumbent Democrat Lee M. Russell was term-limited, and could not run for reelection to a second term.  As was common at the time, the Democratic candidate ran unopposed in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election. The 1947 Mississippi gubernatorial election took place on November 4, 1947, in order to elect the Governor of Mississippi.  Incumbent Democrat Fielding L. Wright, who had succeeded to the governorship a year prior following the death of Thomas L. Bailey, ran for election to a first full term.  As was common at the time, the Democratic candidate won in a landslide so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election. The 1939 Mississippi gubernatorial election took place on November 7, 1939, in order to elect the Governor of Mississippi.  Incumbent Democrat Hugh L. White was term-limited, and could not run for reelection to a second term.  As was common at the time, the Democratic candidate ran unopposed in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election. The 1991 Mississippi gubernatorial election took place on November 5, 1991, in order to elect the Governor of Mississippi.  Incumbent Democrat Ray Mabus unsuccessfully ran for reelection to a second term.  This election marked the first time a Republican was elected Governor of Mississippi since Adelbert Ames in 1873. Theodore Gilmore Bilbo (October 13, 1877August 21, 1947) was an American politician who twice served as governor of Mississippi (1916–20, 1928–32) and later was elected a U.S. Senator (1935–47).  A master of filibuster and scathing rhetoric, a rough-and-tumble fighter in debate, he made his name a synonym for white supremacy.  Like many Southern Democrats of his era, Bilbo believed that black people were inferior; he defended segregation, and was a member of the Ku Klux Klan. The 1919 Mississippi gubernatorial election took place on November 4, 1919, in order to elect the Governor of Mississippi.  Incumbent Democrat Theodore G. Bilbo was term-limited, and could not run for reelection to a second term.  As was common at the time, the Democratic candidate won in a landslide in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election. The 1943 Mississippi gubernatorial election took place on November 2, 1943, in order to elect the Governor of Mississippi.  Incumbent Democrat Paul B. Johnson Sr. was term-limited, and could not run for reelection to a second term (he died less than two months after the election was held).  As was common at the time, the Democratic candidate ran unopposed in the general election so therefore the Democratic primary was the real contest, and winning the primary was considered tantamount to election.

Supporting sentences:
 Incumbent Democrat Theodore G. Bilbo was term-limited, and could not run for reelection to a second term. Theodore Gilmore Bilbo (October 13, 1877August 21, 1947) was an American politician who twice served as governor of Mississippi (1916–20, 1928–32) and later was elected a U.S. Senator (1935–47).  A master of filibuster and scathing rhetoric, a rough-and-tumble fighter in debate, he made his name a synonym for white supremacy.