The map is from an article at Larry Sabato’s Crystalball, which can be found at the above link, about halfway down the page.
Louisiana is, shall we say, unique in the United States in its politics and is politically fragmented like no other State.
I just found it interesting how Abraham’s support went down the middle of the State, while Rispone’s was split most to either side.
Obviously, Edwards got the brunt of his support along the Mississippi River corridor, which has a high black population concentration. He also got support in the eastern part of the State near Mississippi which has a high black concentration and urban centers elsewhere in the State with a mixed white and black population.
While Rispone’s and Abraham’s combined vote percentage was an absolute majority, slightly over 51%, the runoff should be considered to be a dead tossup. It is NOT a given that Rispone will get all of Abraham’s votes in the runoff and there will not be minor candidates draining votes from Edwards.
Sabato and I both rate this a pure tossup. Black turnout will be the key for Edwards.