==U.S. House of Representatives==
Following the death of incumbent popular congressman [[J. Will Taylor|James Willis "J. Will" Taylor, Jr.]] in 1939, Jennings was among several Republican contenders for the seat, which included Taylor's older daughter Elizabeth.<ref>Hill, Ray (September 3, 2018). [https://knoxfocus.com/archives/this-weeks-focus/mystery-j-will-taylors-death-ii/ The Mystery After J. Will Taylor’s Death, II]. ''The Knoxville Focus''. Retrieved August 5, 2021.</ref> However, Elizabeth Taylor ultimately decided against running for her late father's seat, citing her mother's ill health.Jennings, who previously unsuccessfully sought to primary Taylor, subsequently received the GOP nomination and won the special election by a landslide over [[Democrat]] opponent Hammond Fowler.<ref>[https://www.ourcampaigns.com/RaceDetail.html?RaceID=310771 TN - District 02 - Special Election Race - Dec 30, 1939]. ''Our Campaigns''. Retrieved August 5, 2021.</ref>
Jennings voted for the 1940 Gavagan-Fish<ref>FascinatingPolitics (July 1, 2018). [https://fascinatingpolitics.com/2018/07/01/on-ideology-and-anti-lynching-legislation/ On Ideology and Anti-Lynching Legislation]. ''Mad Politics: The Bizarre, Fascinating, and Unknown of American Political History''. Retrieved August 5, 2021.</ref> [[anti-lynching bill]].<ref>[https://www.govtrack.us/congress/votes/76-3/h96 TO PASS H.R. 801, A BILL TO MAKE LYNCHING A FEDERAL CRIME.]. ''GovTrack.us''. Retrieved August 5, 2021.</ref>