Quick History
The Republicans controlled the redistricting process in 2000, shifting the map from a 9-7 Democratic advantage to a 9-6 Republican one. (Michigan lost a seat in reapportionment.) They did this by redistricting three seperate pairs of Democratic incumbents into the same districts, thereby creating two new open Republican seats elsewhere. Architect of this plan? None other than then-state-senator Thaddeus McCotter, who oh-so-thoughtfully created one of those new open districts around his home base.
The GOP plan had turned into a little bit of a dummymander, since by 2008 the Democrats had flipped two districts to get an 8-7 advantage. This week's election, however, has restored the Republican's 9-6 edge. The 1st and 9th districts are in opposite hands from the 2002 elections; all other districts are controlled by the same party that won them eight years ago. (Wikipedia’s version of the pre-Tuesday districts is above for reference.)
The Genesis of this Plan: Failed Attempts
One of my consolations on election night was the idea that even with control over redistricting again, the Republicans couldn't really make it any worse. At the time, it looked the the Democrats were going to be down to five districts: Dearborn-Ann Arbor, Flint-Saginaw, Southfield-Warren, and the two Detroit districts. That seemed like pretty much the rock bottom base of support for the Democrats in Michigan. But then Gary Peters pulled out a narrow victory, and I started to look to see whether the Republicans could get the Democrats down to five after all. Michigan is almost certainly losing another district, so let's see if it can be made a Democratic one.
Four of the six Democratic seats seemed pretty much untouchable. The VRA-protected Detroit-based 13th and 14th districts are, of course, ridiculously Democratic. Sander Levin's 12th district pulls together an only somewhat less-ridiculously-Democratic set of inner suburbs on Detroit's north side. And despite Dale Kildee's narrower-than-expected win on Tuesday, Flint is big enough to dominate pretty much any district you could conceivably put it in. That leaves Gary Peter's 9th district and John Dingell's 15th district as the remaining targets.
My first attempt actually took on John Dingell's district. Stretching from blue collar Dearborn to the university town of Ann Arbor, it was created as one of the three "pairing" districts, setting up then-Representive Lynn Rivers against Dean of the House Dingell. Dearborn was easy to move into John Conyer's 14th district. Ann Arbor has to end up in Democratic district, so I swung Gary Peter's 9th district around to pick it up. Thad McCotter's 11th then mostly gives up its claim on Oakland county to pick up the rest of the dismembered 15th.
The problem with this plan from a GOP perspective is what it does to McCotter. The distict is probably about 60% – 70% new to him, and it's not nearly as Republican as his old district. I haven't run the numbers, but just from eyeballing it, I would be surprised if this version of the 11th district didn't have a Democratic PVI.
My second attempt left Dingell's district more-or-less alone. (As pictured, all of Dingell's hometown of Dearborn ends up in Conyer's district, but this could possibly be played with.) Instead I merged McCotter's 11th district with Peter's 9th district. The resulting district has about half of its population come from each district. (Old Peters in blue; old McCotter in green.) It cuts out the most Democratic parts of each district (Wayne, Westland, and Garden City for the 11th; Pontiac, Auburn Hills, and Royal Oak for the 9th). Again, I haven't run the numbers for PVI; I suspect it's a Bush '04-Obama '08 district.
McCotter probably isn't the best candidate for an incumbent vs incumbent race, but this district — in isolation — would probably suit the state GOP fine.
The problem is what the rest of the state looks like.
Merging the 9th and 11th pulls Mike Roger's 8th district further east and north. This saddles the already swingy 7th district just won by Tim Walberg with heavily Democratic Lansing. The 7th, in turn, now donates Democratic-leaning Battle Creek to Fred Upton's already even-PVI 6th district.
The Solution
So if I couldn't dismantle Dingell's district without giving McCotter too much hostile territory, and if merging McCotter's district and Peter's district resulted in weaker districts for Walberg and Upton, then what?
I was stumped for about a day, when the answer occured to me: attack Sander Levin's 12th district instead.
By bringing the Detroit-based 13th district north across Eight Mile into Macomb county, I could merge the Oakland portion of the 12th district into the 9th. (The old 12th is roughly outlined in white.)
Brief District-by-District Rundown
I'm considering working through the data to get firm PVIs for the proposed districts. For now, you have eyeballing-it. I did refer to the 2004 and 2008 numbers while drafting; I just never actually ran the calculations.
1st District (Blue)
This district is newly captured by Republican Dan Benishek. In the 2000 redistricting, this district was pulled down the Lake Huron coast towards Bay City as part of the dismantling of then-Representative Jim Barcia's district (he got paired with Dale Kildee in the 5th). Without such concerns, I pulled it down the Lake Michigan shoreline instead. Adding the Traverse City area instead of the upper Saginaw Bay area should make this district just slightly more Republican. Traverse is also a better cultural fit for the district. (Note that everything not pictured in the north of the state is in this district.)
2nd District (Green)
This district is currently Michigan's most Republican district by PVI. I don't think my alterations will change that. It gives up its northern reaches to the new 1st and stretches inland, taking in Grand Rapids' northern suburbs and exurbs.
3rd District (Purple)
The primary Republican concern with this district is making sure it has enough suburban/exurban territory to overwhelm the Democratic urban core in Grand Rapids. It gives up some territory north of the city and gains Eaton county to the east. I think this will be slightly more Republican than the existing 3rd.
4th District (Red)
As currently configured, this district is something of a left-overs district, taking in the northern counties not in the Upper Peninsula-based 1st or the Lake-Michigan-coast-based 2nd. Under my proposal, it becomes a somewhat more focused Central Michigan district. Largest city (and hometown of incumbent David Camp) Midland is now in the center of the district instead of on its eastern fringe. It takes in all of Democratic Bay county, but I think the rest of the territory is Republican enough to handle it.
5th District (Yellow)
The proposed 5th district is much like its 1990s-district-plan predecessor, taking in much of the Thumb instead of Bay City. This is because eliminating Levin's 12th district pulled Candice Miller's 10th district out of the Thumb. Since it's over that way anyway, it runs a tendril down the St Clair River to relieve Miller of smallish-but-heavily-Democratic Port Huron.
6th District (Teal)
Not much changes for the 6th. It exchanges a few townships in Calhoun county for a few in Branch, and takes in the rest of Allegan county. That last change should make it slightly more Republican. Incumbent Fred Upton should remain fine here.
7th District (Grey)
This proposal's greatest weakness. Newly re-elected Tim Walberg has a district with a PVI of R+2. Getting Monroe county from the dismantled-by-reapportionment 15th in exchange for giving the new 3rd Eaton county is essentially a wash. I just don't think that there's much the Republicans can really do to shore this district up.
8th District (Slate Blue)
Still subsumes Lansing in a sea of Republican-heavy exurbs. This configuration gives up somewhat-Republican Clinton county to gain very-Republican Lapeer county, so Mike Rogers should be happy.
9th District (Cyan)
The new 9th is one of the center-pieces of the plan. It combines most of Gary Peter's current 9th with about half of Sander Levin's current 12th. If it came to a primary, I'm not sure what would happen. Where the current 9th was designed as a Republican seat that's just slipped away, this 9th would be a Democratic safe seat, anchored by Southfield, Royal Oak, and Pontiac.
10th District (Deep Pink)
Candice Miller's 10th is pulled south by the elimination of the old 12th. Losing most its rural hinterland, the new 10th is definitely more Democratic than the old one, but I don't think it's that much more. I think Miller should still be fine. In one of the rare set of calculations I did do, the portions of Macomb county not in the district (ie, in the new 13th) voted for 63% for Obama. The portions of Macomb in the district voted only 52% for Obama. That probably means that Bush won the new 10ths portion of the county in 2004 (here, we're back to no calculations.)
11th District (Lime Green)
In order to shore up McCotter, the district loses three of its inner surburbs and snakes around the north side of the new 9th to pick up some more heavily Republican territory. McCotter should put up much better numbers in this reconfigured district.
12th District (Cornflower Blue)
With the dismantling of the old 12th, I reused the district designation for the reinvention of Dingell's dismantled-by-reapportionment 15th. The new 12th loses Monroe county to pick up the southern portions of Downriver. I'm pretty sure this will push its PVI in an even-more Democratic direction, and Dingell (and/or his successors) should be safe here all decade.
13th District (Salmon?)
The other centerpiece of this plan. It takes in roughly similar portions of Detroit as its predecessor (along with the Grosse Pointes and Harper Woods.) Instead of stretching into Downriver, though, it crosses over into southern Macomb, snatching away the eastern half of Levin's district and saving Miller from having to take on the most Democratic parts of the county. VRA: 53% black, 42% white.
14th District (Olive Drab)
Conyers' new district takes in basically the same portions of Detroit as his old one. The primary difference are the addition of Redford township, the subtraction of any part of Dearborn, and the taking in of the northern half of the Downriver communities instead of the western half. VRA: 53% black, 34% white.
Pre-Conclusionary Note
I was originally concerned about whether this was too much county-splitting in the Detroit area, but it's actually less than currently exists. Currently, the tri-county Detroit metro area has the following configuration:
Wayne: 2 full districts (13th, 14th), 2 partial districts (11th, 15th)
Oakland: 1 full district (9th), 3 partial districts (8th, 11th, 12th)
Macomb: 2 partial districts (10th, 12th)
for 10 total county-fragments.
Under this new configuration, the tri-county Detroit metro area looks like this:
Wayne: 1 full district (14th), 3 partial districts (11th, 12th, 13th)
Oakland: 1 full district (9th), 2 partial districts (8th, 11th)
Macomb: 2 partial districts (10th, 13th)
for 9 total county-fragments.
Conclusion (TL;DR version)
By eliminating Levin's 12th district, I created four packed super-safe districts for the Democrats in the metro Detroit area, with one other safe Democratic district in the Flint-Saginaw area. Republican incumbents in the 1st, 3rd, 6th, and 11th districts are shored up. Republican incumbents in the 4th and 10th districts take minor hits. The Republican incumbent in the 2nd district needed no help; and the one in the 7th district is unhelpable. This plan would more or less lock in an 8 GOP – 5 Dem – 1 swing district pattern for the rest of the decade.