(By Warren D. Smith with a lot of help from William Poundstone. You can also see our overview of all LA's governor races.)
This election was a plurality plus top-2-runoff election. It excellently illustrates the malfunction of both plain plurality voting and runoff systems and the superiority of approval and range voting.
Instant Runoff Voting (IRV) presumably would have behaved in essentially the same bad way because this race was dominated by the top 3 contenders. (IRV and plain top-2 runoff behave the same in any race with 3 candidates if the voters are the same and act self-consistently. Details.)
The all-time great "better a lizard than a wizard" bumper sticker referred to the corruption allegations that dogged Edwards throughout his career (in 2001 he was sentenced to 10 years in prison on racketeering charges) versus the fact David Duke was "Grand Wizard of the Knights of the Ku Klux Klan." (Duke also served prison time in 2003 after pleading guilty to tax evasion and mail fraud. President Bush on 7 Nov. 1991 said David Duke was a charlatan unfit to hold public office because he has espoused racist and neo-Nazi beliefs [R.Suro: New York Times 7 Nov. 1991 page B18] – thus, unusually for a Republican president, Bush pretty much came out in favor of a Democratic candidate against a Republican. Edwards himself, when asked what he would have to do to beat Duke, famously replied "Stay alive." )
Their face-off happened when the incumbent governor Roemer (who perhaps became unpopular when he switched from Democrat to Republican parties while in office) did not make the runoff.
Edwards won, but Duke nevertheless claimed "moral victory" because exit polls indicated he won among white voters.
First round, 19 October 1991:
|Candidate||Party affiliation||Votes received||Percentage|
|Edwin W. Edwards||Democrat||523,096||33.8%|
|Clyde C. Holloway||Republican||82,683||5.3%|
|Sam S. Jones||Democrat||11,847||<1%|
|Albert Henderson Powell||Democrat||2,053||0%|
|Ronnie Glynn Johnson||None/Other||1,372||0%|
|"Cousin" Ken Lewis||Democrat||1,006||0%|
"Lizard versus Wizard" Runoff, 16 November:
|Candidate||Party affiliation||Votes received||Percentage|
|Edwin W. Edwards||Democrat||1,057,031||61% (wins)|
Roemer would have beaten every rival in a head-to-head contest (was the "Condorcet winner," also called "beats-all winner"). We base that on
If these polls were correct, this election exhibited these 7 "paradoxes":
(Incidentally, who invented Louisiana's runoff system? Edwin W. Edwards!)
What about an 8th kind of paradox: non-monotonicity? To see another non-monotonic IRV election, check Ireland 1990. Actually that election exhibits participation-failure and favorite-betrayal pathologies but is monotonic. It only exhibits non-monotonicity if you alter the scenario by adding some extra Currie voters. That scenario is a "hybrid" of non-monotonicity and no-show paradoxes: Lenihan's supporters made Lenihan lose by voting for him – if they had instead voted for Lenihan's most-hated rival Currie, then Lenihan would have won! A (pure) non-monotonic IRV election is Burlington VT 2009. You also can see a simple artificial incredibly-crazy IRV election example.
W.Poundstone offers this argument that the Louisiana 1991 election also suffered from monotonicity failure:
Suppose that a group of Duke supporters switch their allegiance to Edwards. (I'm not claiming this was politically or psychologically very credible – only that it's a possibility that would have triggered nonmonotonic behavior.) Moving 5.3% of the total electorate from Duke to Edwards, produces this outcome for the first-round vote (these do not total 100% because we are not listing the other candidates):
(Hypothetical) Edwards 39.1% Roemer 26.5% Duke 26.4%
Then Duke rather than Roemer is eliminated, and – if the remaining 26.4% of the voters (all of whom favor Duke) then happened to prefer Roemer over Edwards enough – then Roemer would win. I.e: that 5.3% changing their vote to Edwards would have prevented Edwards' victory!
This indeed demonstrates monotonicity failure.
Approval and especially Range clearly would have outperformed runoff (and instant runoff) in this election; Duke would have had no chance at victory, and the winner would have been Roemer.
In a 30 October 1991 US nationwide Gallup telephone poll,
10% said they had a "favorable" opinion of Duke,
versus 67% "unfavorable."
Admittedly Lousianans seemed to like him more than the USA as a whole,
but even so I think Duke would have ≤33% approval, and certainly ≤39%
which was his official-runoff total and probably includes many who did not approve him
(since certainly Edwards' official-runoff total does).
In a 1991 University of New Orleans telephone poll of random Louisianans, 20% "strongly approved" and 38% "approved" of Roemer (total 58%), versus 21% "disapproving" and 15% "strongly disapproving" (total 36%). Also in twelve 1987 polls Roemer had gotten 39-60% approval versus 30-58% disapproval and even the lowest among those twelve (39%) still would have been enough to make him win. Note Roemer was the only candidate more approved than disapproved.
In 1991, a Mason Dixon Political Media research poll of 816 likely voters found 35% approved and 60% disapproved Edwards; and SRC/Univ. of New Orleans poll of 725 registered voters found 40% approved and 49% disapproved; an SE LA Univ. poll of 700 registered voters found 28% approved and 59% disapproved; and finally a Renwick/Baton Rouge Advocate Poll of 988 registered voters found 32% "favorable" versus 65% "unfavorable." Averaging over all four of those polls (i.e. viewing them as a single poll of 3229 people) we get a net approval=34% disapproval=59% rating for Edwards.
Also in a 2002 look back at Edwin Edwards, the University of New Orleans Survey Research Center asked Louisianans whether they "approve or disapprove of the job that Edwin Edwards did as governor?". 40.1% approved and 45.7% disapproved, and I believe Edwards generally had a worse approval rating in ≈1990 than in 2002. So although these polls unfortunately were of different people at different times with different wordings and hence are not optimally comparable, to the (large) extent they are valid, they indicate Roemer easily would have won an approval-voting election.
Duke enjoyed a vote-split among the non-Duke candidates. With range and approval voting, "vote splitting" does not exist. And range and approval are monotonic, never exhibit "favorite betrayal," and always (under certain fairly plausible assumptions about strategic voter behavior) elect beats-all winners like Roemer.
A range-voting-style telephone poll of 745 Louisianans actually was done by the University of New Orleans in 1991. I warn you that I am not exactly sure what is being reported by them in the concise summary below. (I requested details but they never responded.) But to the extent it is valid, it concluded Roemer would have won with range voting.
On a scale from 0 to 100, where 0 is very cool feelings and 100 represents very warm feelings, what would you rate your feelings about Buddy Roemer, Edwin Edwards, or David Duke in the election for governor? RESULTS: Roemer 30% Edwards 28 Duke 24 Contact Information: Survey Research Center University of New Orleans New Orleans, LA 70148 (504) 286-6459 or 246-3999
John Maginnis: Cross to Bear, Darkhorse Press 1992. (This is an entire book just about this one election; it has a web page.)
Louisiana Secretary of State Elections Division. Official Election Results Database.
Peter Applebome: Blacks and Affluent Whites give Edwards Victory, New York Times 18 Nov. 1991 page A1. («Basically, [Edwin W. Edwards] was elected by blacks and Roemeristas," said Edward Renwick, a Loyola University poll taker...»)
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