She would have lost in 2008 had Louisiana not left the jungle primary system for that election.
Why? She won without a runoff. Are you saying that if Louisiana had used party primaries, Kennedy wouldn't have been the nominee? He was the only one running.
I guess I underestimated Landrieu's margin of victory in 2008. In 2002 and 2014, fringe Democrats got 1.9% and 1.4% respectively, while Ladnrieu won 2008 with 52.1%. So, I stand corrected, Landrieu probably would have barely won outright even with a jungle primary.