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===Disputed 1948 U.S. Senate runoff election===

===Disputed 1948 U.S. Senate runoff election===

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In 1946, Mayborn was elected to the Texas Democratic State Central Committee.  While on the committee, he played a crucial role in the disputed senatorial [[primary]] runoff election of 1948 for the seat vacated by the retiring Willard Lee "Pappy" O'Daniel (1890-1969).

In 1946, Mayborn was elected to the Texas Democratic State Central Committee.  While on the committee, he played a crucial role in the disputed senatorial [[primary]] runoff election of 1948 for the seat vacated by the retiring Willard Lee "Pappy" O'Daniel (1890–1969).

The state committee was asked to declare the winner of the primary after supporters of former Governor [[Coke Stevenson|Coke Robert Stevenson]] (1888–1975), a [[conservative]] Democrat, accused Johnson's campaign of fraudulent voting practices, particularly in Jim Wells County, one of the south Texas "machine" counties controlled by George Berham Parr (1901-1975), the iron-fisted political boss of Duval County. Eighty-seven primary votes were in dispute.<ref>{{cite web|url=https://tshaonline.org/handbook/online/articles/fpa36|title=Parr, George Berham|publisher=Texas State Historical Association: ''The Handbook of Texas''|accessdate=October 23, 2019}}</ref>

The state committee was asked to declare the winner of the primary after supporters of former Governor [[Coke Stevenson|Coke Robert Stevenson]] (1888–1975), a [[conservative]] Democrat, accused Johnson's campaign of fraudulent voting practices, particularly in Jim Wells County, one of the south Texas "machine" counties controlled by [[George Parr|George Berham Parr]] (1901–1975), the iron-fisted political boss of Duval County. Eighty-seven primary votes were in dispute.<ref>{{cite web|url=https://tshaonline.org/handbook/online/articles/fpa36|title=Parr, George Berham|publisher=Texas State Historical Association: ''The Handbook of Texas''|accessdate=October 23, 2019}}</ref>

John Connally, then Johnson's campaign manager, summoned Mayborn from a business trip in Nashville, where Mayborn owned a radio station, to cast the deciding vote in what was to be the committee's 29-28 decision to declare Johnson the winner of the Democratic senatorial nomination.<ref name=bio/> [[U.S. Supreme Court]] Justice [[Hugo Black]], a former [[U.S. Senator]] from [[Alabama]], declared that the Democratic committee would have the sole power to select the nominee, a crushing blow to the Stevenson campaign. Thereafter, embittered at the outcome of the senatorial nomination, Stevenson headed the "Democrats for Nixon" Committee in Texas in 1960, when Johnson was the Democratic vice-presidential nominee on the ticket headed by then Senator [[John F. Kennedy]] of [[Massachusetts]] and also a candidate for senatorial reelection opposed by the Republican [[John Tower]].

[[John Connally]], then Johnson's campaign manager, summoned Mayborn from a business trip in Nashville, where Mayborn owned a radio station, to cast the deciding vote in what was to be the committee's 29–28 decision to declare Johnson the winner of the Democratic senatorial nomination.<ref name=bio/> [[U.S. Supreme Court]] Justice [[Hugo Black]], a former [[U.S. Senator]] from [[Alabama]], declared that the Democratic committee would have the sole power to select the nominee, a crushing blow to the Stevenson campaign. Thereafter, embittered at the outcome of the senatorial nomination, Stevenson headed the "Democrats for Nixon" Committee in Texas in 1960, when Johnson was the Democratic vice-presidential nominee on the ticket headed by then Senator [[John F. Kennedy]] of [[Massachusetts]] and also a candidate for senatorial reelection opposed by the Republican [[John Tower]].

==Legacy==

==Legacy==