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We bridge the gap between mathematics and the law to achieve fair representation through nonpartisan redistricting reform. At @Princeton.
Dec 16, 2021 9 tweets 5 min read
The Pennsylvania Legislative Redistricting Commission released draft State House and State Senate maps and we've got grades.

Importantly, these maps are now subject to 30 days of public comment, after which adjustments can be made and another vote will be held. First up is the State House map. It gets a C overall and in Partisan Fairness, with an F in Competitiveness and a B in Geography.

We'd anticipate somewhere in the neighborhood of 102 Democratic leaning seats, a bare majority in the chamber.

gerrymander.princeton.edu/redistricting-…
Nov 6, 2021 5 tweets 2 min read
Note that the use of the ensemble to evaluate maps with four or fewer districts risks obscuring the influence that a single district change in either Partisan Fairness or Competitiveness can make to overall letter grades. (1/5) And, more importantly, this matters to how residents who live in these states will experience these maps. Letter grades, in the cases of extremely low-district states, should be considered secondarily to other metrics provided. (2/5)
Nov 6, 2021 5 tweets 3 min read
We have grades out for the Ohio Democratic Second Draft Congressional Proposal.

It gets an A overall and in Partisan Fairness, with Cs in Competitiveness and Geography.

It would elect a 9R-6D delegation from OH to Congress.

gerrymander.princeton.edu/redistricting-… It has three competitive seats that all lean R (OH-7 (Medina and Ashland), 10 (Dayton) and 14 (Youngstown)), but in certain years, could elect a Democrat.
Nov 6, 2021 6 tweets 5 min read
We have grades out for the Utah legislature's proposed maps. These maps are going to a public hearing on Monday, so folks in Utah should speak up about what they like and don't like in these maps.

#PGP_UT #UTPol #Redistricting #FairMaps Image First up is the Congressional map. It gets an A overall and in Partisan Fairness, with Cs in Competitiveness and Geography.

It would elect 0 Democrats and has no competitive seats, largely because it splits Salt Lake City across all four districts.

gerrymander.princeton.edu/redistricting-… ImageImage
Nov 5, 2021 4 tweets 3 min read
Georgia has released a new State Senate draft plan and we've got a Report Card out.

It gets an F overall and in Partisan Fairness and Competitiveness, with a C in Geography.

gerrymander.princeton.edu/redistricting-… We'd expect it to elect 33 R and 23 D, with the current Senate split 34R-22D. It would have only 1 competitive seat.

It has 16 districts with a BVAP over 40% and 1 with an HVAP over 40.
Nov 5, 2021 10 tweets 5 min read
The Michigan Independent Redistricting Commission continues its work, having released several new draft maps for public comment. They will be voting on these maps on December 30, so we encourage Michiganders to speak up about what they like and don't like in these drafts. First, the three Congressional drafts.

Apple v. 2: gerrymander.princeton.edu/redistricting-…
Birch v. 2: gerrymander.princeton.edu/redistricting-…
Chestnut: gerrymander.princeton.edu/redistricting-…
Nov 3, 2021 7 tweets 5 min read
North Carolina's special session on redistricting continues and we've got report cards out for the latest iterations of the state house and state senate maps, as well as a reminder of our report cards for the Congressional map.

#FairMaps #Redistricting #NCPol #PGP_NC First, the State House map, HSA-9, also known as HB 976.

It gets an F overall and in Partisan Fairness, a C in Competitiveness and a B in Geography.

It would elect 70R-50D and has 17 competitive seats.

gerrymander.princeton.edu/redistricting-…
Nov 3, 2021 8 tweets 5 min read
Ohio is starting its debate of new Congressional maps. Both the House and Senate Republicans released versions today (neither of which were provided in shapefiles) and while we're waiting on a conversion of the Senate version, we wanted to post our Report Card for the House. It gets an F overall and in Partisan Fairness, and a C in Competitiveness and Geography.

It would elect 12R-3D delegation, though OH-1 (Cincinnati) is very close and could easily elect a Republican some years.

gerrymander.princeton.edu/redistricting-…
Nov 3, 2021 5 tweets 3 min read
We have metrics out for the proposed Arkansas State Senate and State House maps!

State Senate: gerrymander.princeton.edu/redistricting-…
State House: gerrymander.princeton.edu/redistricting-… The State Senate map would likely yield 29 Republican and 6 Democratic seats, with no competitive districts.
Nov 3, 2021 8 tweets 5 min read
With the Georgia special session on redistricting starting today, we have Report Cards out for the Republican state house and state senate maps, which were released last night.

#PGP_GA #GAPol #Redistricting #FairMaps The State House Map gets a B overall and in Partisan Fairness, an F in Competitiveness and a C in Geography.

We'd expect it to elect 98R and 82D, compared to the current map, which elects 101R and 77D (with one vacancy).

gerrymander.princeton.edu/redistricting-…
Nov 2, 2021 8 tweets 5 min read
We have report cards for the final map iterations from the Peoples Map Commission in Wisconsin. This Commission was assembled by the Governor to advise him on redistricting during this cycle.

#PGP_WI #WIPol #FairMaps #Redistricting Image First up is the Congressional Map. It gets a B overall and in Partisan Fairness, with an F in Competitiveness and a C in Geography.

We'd expect it to elect a 4-4 delegation. It only has one competitive district, which is below what we'd expect.

gerrymander.princeton.edu/redistricting-… Image
Nov 2, 2021 7 tweets 4 min read
In Georgia, we’ve got draft maps from the state Democratic caucus, but no draft maps from the state Republican caucus, with the special session on redistricting starting tomorrow. The State Senate draft map gets an A, with an A in partisan fairness and Cs in competitiveness and geographic features. Image
Nov 2, 2021 4 tweets 3 min read
Though it is still in the process of amendment, we thought it was important to get out a Report Card for NC House Map HBK-14, drafted by Representative Hall.

It gets an F overall and in Partisan Fairness, with a C in Competitiveness and a B in Geography.

gerrymander.princeton.edu/redistricting-… Image We'd expect it to elect a 70R-50D House, with 17 competitive seats. In fact, unlike a lot of the other maps we've seen this cycle, it doesn't appear to be explicitly avoiding the competitive zone. Image
Oct 29, 2021 7 tweets 4 min read
The Arizona Independent Redistricting Commission passed its final maps last night, unanimously. Given that prior cycles had unfortunately ended in partisan accusations, a unanimous vote is a huge success! And, our grades suggest they are good maps too! First up, AZ's Congressional Map. It gets an A overall and in Partisan Fairness, and Cs in Competitiveness and Geography.

We'd expect it to elect a 5D-4R delegation, though AZ-1, 6 and 8 are all competitive, with AZ-2 and 4 nearly competitive.

gerrymander.princeton.edu/redistricting-…
Oct 26, 2021 5 tweets 4 min read
The team at the Princeton Gerrymandering Project also has data out for the proposed Alabama Congressional, State Senate, and State House maps.

Congressional: gerrymander.princeton.edu/redistricting-…
Senate: gerrymander.princeton.edu/redistricting-…
House: gerrymander.princeton.edu/redistricting-… Image For the Congressional map, we fined that it is likely to elect a 6R-1D delegation, the same as the current map.

That one D-district, AL-7, is also a black opportunity-to-elect district, though it far exceeds the 50% BVAP threshold required to make it effective. Image
Oct 26, 2021 14 tweets 7 min read
Another mountain west state that has an advisory commission, Utah's Independent Redistricting Commission also has selected the maps it will propose to the state legislature and we've got grades! First up, the three Congressional proposals:

Public SH2: gerrymander.princeton.edu/redistricting-…
Orange 3: gerrymander.princeton.edu/redistricting-…
Purple 4: gerrymander.princeton.edu/redistricting-… Image
Oct 3, 2021 5 tweets 3 min read
Princeton Gerrymandering Project is live with our latest report cards out of Virginia. Maps A7 for the House of Delegates and A5 for the State Senate were released this morning.

A7 House of Delegates: gerrymander.princeton.edu/redistricting-…
A5 State Senate: gerrymander.princeton.edu/redistricting-… We give the A7 House of Delegates Map a B. It gets a B on Partisan Fairness, a C in Competitiveness, and a B in Geographic Features. It, like several of the maps proposed yesterday and earlier in this process, has a noticeable line of BVAP population above 50%.
Oct 2, 2021 6 tweets 3 min read
The Princeton Gerrymandering Project has a report card for the most recent Virginia House of Delegate proposals and State Senate Proposals.

VA SH A6: gerrymander.princeton.edu/redistricting-…
VA SH B6: gerrymander.princeton.edu/redistricting-…
VA SS A4: gerrymander.princeton.edu/redistricting-…
VA SS B4: gerrymander.princeton.edu/redistricting-… The overall grade for the A6 Draft House of Delegates Map is a B.
The map has slight R advantage, is similarly competitive to other maps that could have been drawn, and contains few county splits.
Sep 30, 2021 4 tweets 1 min read
In view of the midnight deadline for Ohio's Congressional redistricting, the Princeton Gerrymandering Project has a report card for the Draft Democratic Congressional Map.
The overall score is B.
gerrymander.princeton.edu/redistricting-… Image The map receives a B in Partisan Fairness, meaning a slight D advantage. Out of 15 districts, 8 lean D. Ohio is, roughly, 55R - 45D. The map is barely competitive: only three districts in our competitive zone.
Sep 29, 2021 11 tweets 2 min read
We have a report card for the Georgia 2021 Draft Staff Congressional Map. The overall grade is C.
gerrymander.princeton.edu/redistricting-… The map gets a C in Partisan Fairness - favoring the GOP, with an expected delegation of 9R/5D.
The map gets a C in Competitiveness - despite 0 competitive districts, our findings suggest D and R voters in GA are clustered - there is strong partisan sorting in the state.
Sep 27, 2021 5 tweets 1 min read
We have a report card for the Texas 2021 Draft Staff Congressional Map. gerrymander.princeton.edu/redistricting-… The map gets an F in geography - it has many noncompact districts and splits a large number of counties.
The map gets an F in partisan fairness - it draws far too many Republican districts.