| The state will lose one of its seats, and like most people I assume that they will throw Dem incumbents Gary Peters and Sander Levin into one district. Most of the population losses have been in the inner Detroit area, and they probably can't mess with Hansen Clarke's MI13 or John Conyers' MI14 too much as it is easy to draw two compact majority-black districts for them. The Republicans must face a major decision: do they try to hold all 9 seats they currently have and risk losing a bunch of them in a blue wave year, or do they sacrifice one of them to shore up some of the others? They have one glaring problem: Ingham county. As in Ohio, the seat of state government and a huge public university create a big blue menace in the middle of a bunch of Republican-held districts. Obama won it by 50k votes, about 2-1. Michigan Reeps attached it to Republican areas further east in Mike Rogers' MI8, thus creating two swing districts instead of one red one and one blue one. This worked out for them except in 2008 when Mark Schauer took MI7 south of Lansing from Tim Walberg. Maximizing the number of winnable districts worked well for the Reeps for most of the 00s, and for that reason I expect them to try it again. However, the state as a whole has been trending blue for some time and I think they would have an easier time holding the House if they try to push up their floor instead of their ceiling. So here are two scenarios: one in which they sacrifice a seat in the Lansing area and one in which they try to hold everything.
Scenario 1: Throw Walberg under the bus!
Here they create a Democratic sink in the Lansing area primarily from Walberg's district to make things easier for Rogers and Justin Amash. The state map:
Everything north of the top edge is in Dan Benishek's MI1. The Detroit-area closeup:
Notes on districts follow. In each case O or M followed by a number indicates Obama's or McCains's 2008 margin in thousands of votes.
MI1 (blue): Loses Arenac and Gladwin which combined are O1, and the northern part of Bay which is probably more like those two counties than the rest of Bay, which was O9 overall. Gains Kalkaska, Grand Traverse, Benzie, and Leelanau which collectively are M1. There isn't much opportunity for mischief here since the district is shoved into the northern end of the state and the northern lower peninsula has very few counties where either candidate won by as much as 10%. It would still be R+3.
MI2 (green): Rookie Bill Huizenga's district loses Benzie and northern Allegan and gains suburban and exurban precincts north of Grand Rapids. The current district is the reddest in the state at R+7 and this would not change much.
MI3 (purple): Amash's district will probably be pushed south to some extent as MI1 needs to expand, which will likely push MI2 into MI3. Here the lost northern suburbs and exurbs are replaced with most of Allegan, which was M6 (roughly R+9). The current district is R+6 and the new one would likely be about the same.
MI4 (red): Dave Camp is the chair of the Ways and Means committee and I think the Reeps will ensure that his district, currently just R+3, is not weakened. Here it swaps out marginal areas near Traverse City with similar areas near Saginaw Bay (see MI1 above), loses a few (bluish?) precincts near Saginaw, and picks up O0 (that's Obama by less than 500 votes, roughly R+3) Clinton and the southern part of O3 Shiawassee.
MI5 (yellow): Dale Kildee's district will be pushed east if Levin and Peters are thrown together. The thumb has to go somewhere, and it can't stay in Candice Miller's MI10. Here it loses (bluish?) suburbs and exurbs south of Flint, and gains M1 Huron, M2 Sanilac, and most of O2 St.Clair. This district is currently D+11 and would probably be D+9 or D+10 under the proposed map. It serves the same purpose: a blue sink with Flint, Saginaw, and Bay City.
MI6 (teal): Fred Upton's district makes up for the loss of much of Allegan with M1 Branch and M2 (roughly R+10) Hillsdale, along with less-populated parts of purple Lenawee. Overall PVI of zero before and after. Kalamazoo (O25, D+7) is this district's big problem, but you may not be able to legally make a blue sink that takes in both Lansing and Kalamazoo.
MI7 (gray): Here we create a blue sink from what used to be Walberg's R+2 district. He loses Branch, Hillsdale, Lenawee, and purplish areas of Washtenaw and gets stuck with O49 (D+13) Ingham. The new MI7 also has O5 (D+1) Eaton, O6 (D+1) Calhoun, O2 (R+2) Jackson, and the west end of Washtenaw. Obama won the whole thing by at least 60k, and it's hopeless for a Republican. Joe Schwarz might be able to lose respectably here, but he wouldn't be able to win.
MI8 (blue-gray): Rogers moves east, ridding himself of Ingham, Clinton, and southern Shiawassee and swaps in M1 (R+5) Lapeer and suburban/exurban parts of Oakland, Washtenaw, and Genesee. The district's new areas are less red than M13 (R+10) Livingston, but it's likely R+6 to R+8 overall whereas the current MI8 is just R+2.
MI9 (toothpaste blue): What's left after you merge Peters and Levin is another blue sink with blue pieces of southern Oakland and Macomb. For what it's worth Levin lives here and Peters doesn't.
MI10 (pink): Miller has to pick up some vacated areas from the current MI9 and MI12, and she gets Rochester Hills, much of Troy, Mt. Clemens, and part of Sterling Heights. This area is probably less safe overall than the reddish areas of the thumb that she has to vacate, and I suspect that the district's PVI would drop from R+5 to R+3 or R+4. But there isn't much of an alternative if you want to merge Levin and Peters.
MI11 (pea soup green): Thad McCotter's district moves east but retains its base in northwestern Wayne County. In Wayne, it drops Belleville and blue Redford and picks up Dearborn Heights. In Oakland, he keeps Novi and not much else, losing the exurban western areas to MI8 and picking up Waterford and the (more problematic?) West Bloomfield and Farmington Hills from MI9. The current MI11 has a PVI of zero and I suspect the new changes would be about a wash. I think the biggest problem with the new MI11 is that is Peters lives there. Having MI8 reach down to pick up W. Bloomfield might violate the compactness or community of interest provisions of the redistricting law, although it might be feasible to swap some northern parts of Oakland county for pieces of Washtenaw and Livingston that I have going into MI8.
MI12 (lighter blue-gray): John Dingell's old MI15 moves slightly west, but still contains Ann Arbor and Ypsilanti and is therefore a blue fortress. His home in Dearborn will probably end up in MI14 as the Detroit districts need to expand.
MI13 (faded pink): Clarke's district has to cross 8 Mile to pick up part of Warren and Eastpointe. It's 56% black.
MI14 (brown): Conyers' district moves west to pick up Dearborn, Redford, and Inkster. It's 53% black. Both MI13 and MI14 still have PVIs of D+fuhgeddaboutit.
Scenario 2: A 9-5 map, if you can keep it
Here Rogers keeps Lansing, and as before most of the other central and eastern districts have to move in the direction of the areas vacated by merging Levin and Peters. State map:
Detroit area map:
District comments. Unless otherwise noted, "changes" here are relative to the map discussed above, not the current map.
MI1, MI2: no changes.
MI3: Here Amash cannot pick up Allegan, as Upton will need the rest of it as a substitute for Branch and Hillsdale. He has nowhere to go but Eaton, and the result is a district that Obama won: Ionia was M1, Barry M3, and Eaton O5. Kent was O2, and Amash's piece (Grand Rapids and everything south or west of it) is clearly more blue than the county average. Overall the new MI3 would be R+3 at best, and Amash would likely be vulnerable in a year that is average or better for Dems.
MI4: Here Camp loses northern Shiawassee and replaces it with suburban/exurban areas of Genesee and Saginaw. Probably minimal impact.
MI5: Picks up Lapeer and some of St. Clair, loses bits of Genesee and Saginaw, still a blue sink.
MI6: Picks up the rest of Allegan instead of Branch and Hillsdale. Probably about a wash.
MI7: This time it isn't sacrificed. Relative to the current MI7 it has to move east, so it swaps out O5 (D+1) Eaton for O3 (R+1) Monroe and makes minor changes in Washtenaw and Calhoun. Probably still R+2, which doesn't bode well for Walberg after his narrow win on the red wave of 2010.
MI8: Again relative to the current map, it swaps out O0 (R+3) Clinton and part of exurban northern Oakland for northern Shiawassee (O3, D+1) and southern Genesee. This appears less favorable for Rogers than his current district, and would likely move it from R+2 to R+1 or even.
MI9, MI10: Trivial changes.
MI11: Loses much of its Wayne turf including Dearborn Heights, Westland, and Canton and retains more of western and northern Oakland. Possibly better for McCotter than the MI11 from the first map, but this time he is in no position to get any favors from Rogers who is saddled with a shaky district.
MI12: Has more of Dingell's old stomping grounds. Still a blue sink.
MI13, MI14: no changes.
In the first map, the Reeps give up Walberg's seat to make Amash somewhat safer and Rogers much safer. Alternatively, they may be able to have Rogers take on a bit more risk (albeit much less than he has now) to make McCotter somewhat safer. The second map is a dummymander in my opinion. Amash, Walberg, and possibly Rogers would all be at serious risk. McCotter would almost certainly be vulnerable to a challenge from Peters, although this is also true of the first map as shown. Politically Michigan is much more like Wisconsin than Ohio: it has lots of purple and not much deep red, and it's difficult to do a Republican gerrymander.
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