Louisiana's 3rd congressional district is a United States congressional district in the U.S. state of Louisiana. The district covers the southwestern and south central portion of the state, ranging from the Texas border to the Atchafalaya River.
Louisiana gained its 2nd and 3rd congressional districts in 1823 as part of the 18th United States Congress. Since at least the 1870s, the district has been strongly influenced by southern Louisiana's Acadian culture.
Although the 3rd congressional district had been Democratic through much of its history, it is the sole district in Louisiana to have been represented by three parties during the 20th century, in that Whitmell P. Martin represented the district as a "Bull Moose" Progressive from 1915 to 1919, when he switched to the Democratic Party. Since the turn of the 20th century, it had dominated Louisiana as a one-party state after the legislature passed a new constitution that effectively disenfranchised African Americans through the 1960s. Martin remained in office as a Democrat until his death in 1929.
The district became more competitive for the Republicans later in the 20th century, when conservative whites shifted into the Republican Party after passage of civil rights legislation by Congress. In 1966, Hall Lyons of Lafayette, polled 40 percent of the vote as a Republican candidate against veteran Democratic incumbent Edwin E. Willis. In 1972, the district elected David C. Treen as the first Republican U.S. representative from Louisiana since 1891.
The state legislature redistricted in the 1980s, pushing the district out of the fast-growing suburbs of Metairie and the city of Kenner, to help keep the seat in the hands of Treen's Democratic successor, Billy Tauzin. Tauzin eventually switched to the Republican Party in 1995, making the 3rd congressional district unique in 20th-century Louisiana politics as the sole district to have two representatives who switched parties (Martin, who switched from the Progressives to the Democrats in 1918, and Tauzin, who switched from the Democrats to the Republicans in 1995). As a Republican, Tauzin continued to serve until retiring from Congress in 2005. DemocratCharlie Melançon won the seat in 2004 (seated in 2005), was reelected in 2006, and was unopposed in 2008.
However, when Louisiana lost a district after the 2010 census, the old 3rd was dismantled. The new 3rd included most of southwestern Louisiana, including Lafayette and Lake Charles. Most of this territory had been the 7th district before the 2010 census. The old 3rd's last congressman, freshman Republican Jeff Landry, had his home in New Iberia, along with much of the western portion of his district, drawn into the new 3rd. He opted to challenge the 7th district's four-term incumbent, fellow Republican Charles Boustany, in the GOP primary. However, Landry could not overcome the fact that he was running in a district in which more than 60 percent of his constituents were new to him. He lost to Boustany in the primary, ending his brief congressional career. The new 3rd, like both the old 3rd and 7th, has a rich Cajun culture.
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