Wisconsin Republicans
gained control of the state legislature and the governor's office in 2010 for
the first time in 40 years and then set about drawing up legislative districts to
secure a Republican majority for the rest of the decade. As the legislature was
about to act, an aide to the Senate's Republican leader told the GOP caucus
they had "an opportunity and an obligation to draw these maps that
Republicans haven’t had in decades."
The legislative districts
have now been found by a federal court to have been designed to benefit
Republicans and to have had that intended effect. That much is obvious from
election statistics. Republicans drew 48.6 percent of the votes cast for
Assembly candidates in 2012 but won 60 of the chamber's 99 seats. Two years
later, Republicans won 63 Assembly seats with 52 percent of the statewide vote.
Democratic voters challenging
the redistricting have now won a split ruling from a three-judge federal district court that
the redistricting amounts to an unconstitutional political gerrymander. The new
map was "intended to burden the representational rights of Democratic
voters throughout the decennial period
by impeding their ability to translate their votes into legislative
seats," Judge Kenneth Ripple wrote for the court.
Both the plaintiffs and the
court faced the difficulty that up till now the Supreme Court has failed to
find a basis to decide when partisan gerrymandering goes too far. In three decisions
over the span of 20 years, the court has recognized constitutional claims
against political gerrymandering but upheld each of the challenged plans for
lack of any agreed-on standard to apply.
To remedy that gap, the
plaintiffs secured the services of an experienced election law litigator now at
the University of Chicago Law School. Nicholas Stephanopoulos, just granted
tenure at Chicago after several years previously at the Washington law firm
Jenner & Block, believes that he and an academic colleague have found the
silver bullet needed to establish a legal limit on partisan manipulation in
redistricting.
The answer proposed in a law journal article by Stephanopoulos and his coauthor, the
California political scientist Eric McGhee, is appealingly straightforward.
They created a quantifiable datum they call it the "efficiency
gap" to compare how efficiently the respective political
parties use their voters to win legislative seats.
In brief, think of the
winning party's margin of victory in any district beyond a one-vote plurality as
"wasted" votes -- more than needed to win the seat. Votes cast for a
losing candidate are wasted by the other party. Add up all the wasted votes
either "surplus" votes or "lost" votes for each
party, calculate the difference, and divide by the total number of votes cast.
A low figure, say 2 percent, indicates a district map of relative partisan
fairness, but Stephanopoulos and McGhee argue that a figure above some
threshold they suggest 8 percent goes too far and ought
to be deemed unfair enough for a court to rule the redistricting plan
presumptively invalid. Based on this measure, they say partisan gerrymandering
is worse now than ever in the elections they studied.
Stephanopoulos and McGhee
argued that their test was better than what has been called the "partisan
symmetry" test. Under that approach, a redistricting plan survives
challenge as a partisan gerrymander politically if each party would win the
same number of legislative seats for a particular vote percentage as the other
party would win if it had received the same percentage of the vote.
Five justices indicated support
for this approach in the most recent decision, Latin American League
of United Citizens v. Perry (2006), but in the main opinion Justice
Anthony M. Kennedy said the plaintiffs had offered no way to measure how much
asymmetry was too much. Stephanopoulos and McGhee say their approach has the
advantage of using actual election data instead of a hypothetical election and
they go one step further by suggesting a threshold to define how much is too
much.
The majority judges in the Wisconsin case were convinced that the
11.69 percent efficiency gap was too much. Lawyers for the state argued that
the Republicans' advantage stemmed from political geography: Democrats are
concentrated in urban areas so more "surplus votes"
while Republicans are dispersed more widely in suburban and rural areas. In his
opinion, Ripple, a senior circuit judge appointed by President Ronald Reagan in
1985, acknowledged the point but said it gave Republicans only "a modest
advantage," not the lopsided edge they achieved with the maps being
challenged.
The two other judges split
along partisan lines. Barbara Crabb, a senior judge named by President Jimmy
Carter in 1979, joined Ripple's opinion, while William Griesbach, named by
President George W. Bush in 2002, dissented. In his dissent, Griesbach argued
that the efficiency gap "oversimplifies political injury," but he
appeared to offer no alternate approach.
Stephanopoulos got the
unusual opportunity for a professor to put his academic theory into practice
after a fellow election law scholar referred him to the Wisconsin plaintiffs to
represent them. The state plans to appeal the ruling to the Supreme Court.
Stephanopoulos welcomes the chance. The case, he says, would give the Supreme
Court "a golden opportunity to put a stop to one of the most pernicious
and undemocratic practices in American politics today." As always, court
watchers will be watching Kennedy, but the case is unlikely to reach the
justices before next fall.