The Famed 'Iowa Model'
Unlike in most states where legislative leaders huddle in backrooms to carve up districts for political advantage, Iowa hands the pen to a non-partisan state agency. Since a 1980 reform, the state’s congressional
and legislative districts have been drawn by the Legislative Services Agency (LSA), a body of civil servants. Their mandate is to create maps based on strict, neutral criteria, primarily population equality. The law explicitly forbids them from considering political data, such as voter registration numbers, past election results, or even the home addresses of incumbent politicians. This approach is designed to produce compact, common-sense districts that respect county and city boundaries, rather than politically motivated, sprawling shapes.
How The First Drafts Are Made
Following each U.S. Census, the LSA gets to work, feeding population data into a system guided by its strict, apolitical rules. They are assisted by a five-member Temporary Redistricting Advisory Commission, whose members are chosen by legislative leaders from both parties. This commission holds public hearings to gather citizen input, but the LSA retains control over the drafting process. The result is a single bill containing a complete set of proposed maps for Iowa's U.S. House seats and its state legislative districts. This bill is then sent to the Iowa General Assembly for a vote, which is where the political part of the process begins.
An Up-or-Down Vote
Here is where Iowa’s system diverges sharply from the norm. The state legislature cannot amend the first set of maps it receives from the LSA. Lawmakers are presented with a simple choice: vote the entire plan up or down. If the bill passes both chambers, it heads to the governor's desk. If it's rejected, the LSA is required to draw a second set of maps, taking into account the legislature's reasons for rejection. The legislature must then hold another unamendable, up-or-down vote. If that second map is also rejected, the LSA draws a third. Only after three LSA-drawn maps have been voted down can the legislature begin to amend the maps or introduce its own plan. Though this route exists, it has never been used since the system's adoption in 1980.
The Governor’s Ultimate Power: The Veto
This is where the governor’s primary formal power comes into play. The redistricting plan passed by the legislature is treated like any other piece of legislation, meaning it is subject to a gubernatorial veto. A governor can sign the map bill into law, allow it to become law without a signature, or veto it. A veto sends the entire map plan back to the legislature and effectively acts as a rejection, forcing the process to move to the next stage. For example, if the legislature approves the first map from the LSA, a governor’s veto would kill that map and compel the LSA to draw a second version. This happened in the 2021 cycle, when the first map was rejected by the legislature, but the second was approved by the legislature and signed into law by Governor Kim Reynolds.
The Bully Pulpit and Informal Influence
Beyond the formal veto power, the governor holds significant informal influence. As the state's highest-ranking and most visible elected official, a governor can use the “bully pulpit” to shape public opinion and apply pressure on legislators. By publicly praising or criticizing a proposed map, the governor can signal their intentions and influence votes in the General Assembly. A governor who is publicly skeptical of a map might embolden legislators in their own party to vote it down, knowing they have the executive's backing. Conversely, a governor’s strong public support can help shepherd a plan through the legislative process. This soft power, while not written into the law, is a potent tool in a process that, while non-partisan in drafting, remains political in its approval.
