When the map by Republican operative David Brooks was put together in 2011, he provided summaries purportedly showing that, using the 2010 data, the Republican party would have a majority in 15 of the 25 council districts. I questioned whether that was possible given the growing Democratic majority in Marion County. Indeed when I ran the Brooks map using the 2012 election numbers, I found dramatic reductions in the Republican baseline in virtually every district from 2010 (as claimed by Brooks) to 2012, so much so that the Democrats had a 17-8 majority under the Brooks map.
The good news for the GOP is that there are more Republican districts in the Marion County Superior Court map than the one drawn by Brooks. According to my analysis, again, using 2012 election data, the Democratic majority, as measured by the baseline in each district is 15-10.
Unfortunately for Republicans that is the only good news about the judicially-drawn map. Republicans have five districts (3, 4, 5, 17 and 19) which only lean (less than 6 point spread) Republican. The margin between the partisan baselines in those districts is only 3.2, 2.6, 3.6, 2.8 and 1.8 respectively. Districts 3, 4 and 5 are districts in eastern Washington Township and Lawrence Township. District 17 is in the Irvington area while District 19 is at the corner where four townships (Center, Perry, Wayne and Decatur come together). My guess is that these leaning Republican districts will prove to be more Republican in the low turnout municipal election year.
Meanwhile the Democrats have no close districts to defend. District 12, which sets on the far west side of Wayne Township is a moderately competitive Democratic district with an 8 point spread. Meanwhile Republicans have a moderately competitive district, District 24 (northern Perry Township) that has a baseline margin of 10.4 points.
That's it for election competition. The rest of the districts are noncompetitive, i.e. more than a 15 point spread between the two baselines, and often much, much more than that. Republicans have 4 solidly GOP districts (18, 22, 23, and 25) all on the southside. Their margins are, respectively 16.0, 23.4, 23.8 and 19.5. Democrats meanwhile have 14 solidly Democratic districts (1, 2, 6, 7, 8, 9, 10, 11, 14, 15, 16, 18, 20, 21) that respectively have margins of 34.4, 24.6, 32.0, 65.2, 45.3 54.6, 59.2, 42.8, 76.4, 74.2, 77.4, 16.0, 40.0, 22.0.
In summary, there are only 7 council districts that are close or moderately competitive and 6 are those are Republican baseline seats. Eighteen of the districts are non-competitive, some spectacularly uncompetitive. The maximum number of seats Republicans can win on this map is ten, eleven if everything breaks right and they win District 12. If it is a bad Republican year, the Democrats on the high end could end up winning as many as 20 districts.
Here is the table showing my analysis.