Part 8 in Evan Burger’s series on Iowa redistricting.

This morning, Iowa’s nonpartisan Legislative Services Agency (LSA) released their second redistricting proposal on October 21. Here’s a quick analysis of the Congressional map included in Plan 2; Laura Belin will write a companion piece examining the legislative maps later today.

The big takeaway is that this plan strongly resembles Iowa’s current map of U.S. House districts, especially when you look at the ten largest counties. Here is how Plan 2 groups those counties:

• IA-01: Johnson (Iowa City), Scott (Quad Cities)
• IA-02: Linn (Cedar Rapids), Black Hawk (Waterloo/Cedar Falls), Dubuque
• IA-03: Polk (Des Moines area), Dallas (Des Moines suburbs)
• IA-04: Story (Ames), Woodbury (Sioux City), Pottawattamie (Council Bluffs)

The current map groups those counties the same way, with the exception of Pottawattamie, which moves from the Polk district to the Story district.

Evan Burger continues his series on redistricting with analysis of the newly released proposed congressional map.

This morning, the Legislative Services Agency released their first set of proposed maps, which can be found here. As expected, the LSA released both congressional and legislative maps — for today I’ll focus on the former, with more analysis to come on the legislative front.

By the numbers

As I’ve written here before, the three standards that the LSA considers in producing a map are contiguity, population equality, and compactness. Of the three, contiguity is an absolute standard: a congressional district must be made up of whole counties that are contiguous. The next most important standard is population equality, meaning the LSA tries to make districts as close in population as possible. However, they must also consider the compactness of a given map, both in terms of minimizing the difference between the length and width of each district, and in terms of minimizing the total perimeter length of all districts.

The LSA’s proposed congressional map easily meets the contiguity requirement. Here is how it scores on population equality and the two measures of compactness:

• Lowest Population: District 2 (797,556)
• Highest Population: District 1 (797,655)
• Difference between lowest and highest population: 99
• Total Perimeter Score: 2,772.02 miles
• Average Length-Width Compactness: 34.96 miles

Evan Burger continues his series on redistricting with analysis of some of the reddest and bluest possible Congressional districts.

On August 12, the Census Bureau released the “PL 94-171 Redistricting Data File” – the official population counts of every precinct, city, county, and state in the country, as of April 1, 2020.

As I wrote last weekend, Iowa’s redistricting process can now start in earnest – and members of the public can get a clearer view of what districts are possible. For today, I’ll focus on the implications for Iowa’s Congressional maps. Future articles will contain similar analysis at the legislative level.

Evan Burger continues his series of posts on Iowa redistricting scenarios.

Last week, the U.S. Census Bureau announced some exciting news: they will release the next round of redistricting data this Thursday, August 12, four days earlier than promised. 

At long last, Iowa will have the population counts needed to start drawing new district lines – and just in time, considering that the Iowa Constitution requires the legislature to finish redistricting by September 15. 

Evan Burger previously wrote about Iowa Congressional and state legislative redistricting scenarios. -promoted by Laura Belin

Today I’ll continue my ongoing series on redistricting with a deeper dive on Iowa legislative redistricting, using Story County as a case study. A few general updates to start:

First, the partisan battle lines over Iowa redistricting are starting to shape up. According to several press reports, including this recent Des Moines Register article, Republican leaders are floating the idea of suing the Census Bureau to get data earlier than September 30th:

Evan Burger speculates on how statutory requirements for drawing new Iowa House and Senate districts could impact partisan control of the legislature during the 2020s. -promoted by Laura Belin

Last month, I wrote about the rules governing Iowa’s Congressional redistricting process, and made some predictions. For this post, I’ll do the same for the legislative side of redistricting – but first, a quick mention of two related developments since my last piece.