Republicans and Democrats. Many Republican lawmakers say the plan should be rejected in favor of a new one. Democrats, including Gov. Tom Vilsack, say the plan should be passed. Every 10 years, after the release of a new census, the service bureau redraws political boundaries to equalize population in voting districts. The GOP wants tighter population variances.
Democrats say the maps are fair.
The differences, though, are quite slim. Take, for example, the congressional districts, which are supposed to be as close as possible to 585,265 people per district. In 1991, the average difference among districts was 100 people. In this year's plan, the difference is 130 people. That's a change of 30 people.