Louisiana held its congressional primary on October 4. In the 4th district, no one got a majority in either the Democratic or Republican primaries. Therefore, both parties will hold run-off primaries on November 4, and the general election for that seat will be held on December 6.
In the 2nd district, no one got 50% of the vote in the Democratic primary, so that district will also hold a run-off primary on November 4, and the general election will be December 6.