For the third election in a row, House Republicans got bonus seats in 2016, through gerrymandering. Thanks to a grassroots citizen movement and computer sleuthing, Florida admitted to breaking the law and has replaced state maps with more competitive, voter-friendly districts.

In Iowa, the “redistricting” of the state’s legislative and congressional boundaries is done by mapmakers who abide by nonpartisan metrics that all sides agree are fair — a seemingly revolutionary concept in the high-stakes decennial rite of redistricting.

Politicians across the country draw voting maps to favor their own political parties. In Michigan, a state with extreme congressional gerrymandering, voters are saying enough is enough. A nonpartisan group called Voters Not Politicians has collected 425,000 signatures in support of a ballot measure to create an independent commission to determine voting districts. The all-volunteer force gathered proposals at town hall meetings and spoke with voters at parades, football games, and even highway rest stops.

A statistic called the efficiency gap seems like a simple way to measure partisan gerrymandering. It’s easy to calculate and relies on actual election results, not hypothetical results, something called for back in 2004 and 2006 when alleged cases of gerrymandering were found by the U.S. Supreme Court to be too speculative to be ruled unconstitutional. However, the efficiency gap fails to account for key factors such as political geography, making it less of a silver bullet than originally hoped.