[1] He subsequently served for three terms in the United States Senate from Louisiana before being defeated in the 1930 Democratic primary for the seat by Governor Huey Long.

Hardtner was the last Republican to contest the seat until 1976, when Frank Spooner of Monroe waged a strong but losing challenge to the Democrat Jerry Huckaby of Ringgold in Bienville Parish.

By 1910, Hardtner had switched to Democratic affiliation and served for two years in the Louisiana House of Representatives as the first member ever from La Salle Parish.

Huey Pierce Long Jr., while himself running for a second term on the regulatory Louisiana Public Service Commission spent more time supporting Ransdell for the Senate than he did his own campaign in which he carried all twenty-eight parishes in his district.

At the rally, Huey Long began "a harangue that castigated their closest friends and political allies and the old establishment itself, of which these men were a part.

"[2] Particularly outraged at Long's treatment of the Randsdells was state Senator Norris C. Williamson of East Carroll Parish, the vice-president of the Constitutional League of Louisiana.

When his Senate tenure ended in 1931, Ransdell returned to Lake Providence to engage in real estate and growing cotton and pecans.

Following Hurricane Katrina, Democratic Governor Kathleen Babineaux Blanco named David Voelker to the Louisiana Recovery Authority.

[6] In 2008, though he had been identified previously as a "longtime, diehard Republican", David Voelker was the largest donor in Louisiana to Democrat Barack H. Obama of Illinois, having given the then neophyte presidential candidate $80,000, (~$111,180 in 2023) according to the nonpartisan OpenSecrets in Washington, D.C.[7] Ransdell named the community of Elmwood southwest of Lake Providence, where he owned much of the land, for his boyhood plantation in Rapides parish.

In 1976, more than thirty years after Ransdell's death, St. Patrick's Roman Catholic Church in Lake Providence moved into a new building on a lot which the former senator had willed to the congregation.

[5] A biography of Ransdell was written in 1951 by Adras LaBorde, long-time managing editor of the Alexandria Daily Town Talk.