On the left is the primary held in October 1991, and on the right if the general election held in November 1991.
Lt. Governor:
Schwegmann led Hardy 42.9-42.6 in the primary and beat him 59-41 in the second round.
Secretary of State
McKeithen led 46-28 over Schmidt with 26% for Chehardy (a Democrat), and he won 50.3-49.7 in the runoff.
I'd imagine that a comparison of Bagert/Ieyoub Attorney General maps would be similarly ugly, since Ieyoub won the runoff 69/31 after leading Bagert by a 31/22 margin in the first round.
In other words, David Duke being on the top of the ballot really dragged down the other Republicans.