METHODOLOGY
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Chance of being represented by either party
100% D
100% R
| Usually Democratic districts | Highly competitive districts | Usually Republican districts | |
|---|---|---|---|
| Current |
| Usually Democratic districts | Highly competitive districts | Usually Republican districts | |
|---|---|---|---|
| Current |
The expected number of seats controlled by Democrats and Republicans, based on their long-term likelihood of winning each district
| Map | Dem. | GOP |
|---|---|---|
| Democratic gerrymander | ||
| Proportionally partisan | ||
| Majority minority | ||
| Highly competitive | ||
| Compact (borders) | ||
| Compact (algorithmic) | ||
| Current | ||
| Republican gerrymander |
How the maps compare on district competitiveness, minority makeup, respect for local borders, compactness and the efficiency gap, an attempt to gauge how politically gerrymandered a set of districts is
Efficiency gap
A measure of “wasted” votes, by the size of the advantage and which party it favors
| Proportional | R+1% |
| Competitive | D+3% |
| Compact (algorithmic) | R+3% |
| Compact (borders) | R+4% |
| Majority minority | R+4% |
| Current | R+7% |
| Dem. gerrymander | D+9% |
| GOP gerrymander | R+18% |
Competitive districts
Number of districts in which both parties have at least a 1-in-6 chance of winning
| Competitive | 242 |
| Compact (algorithmic) | 104 |
| Compact (borders) | 99 |
| Proportional | 82 |
| Majority minority | 82 |
| Current | 72 |
| Dem. gerrymander | 27 |
| GOP gerrymander | 21 |
Majority-nonwhite districts
Number of districts in which a majority of the voting-age population is nonwhite
| Majority minority | 143 |
| Dem. gerrymander | 98 |
| Current | 95 |
| Proportional | 93 |
| Compact (borders) | 92 |
| Competitive | 91 |
| GOP gerrymander | 90 |
| Compact (algorithmic) | 89 |
County splits
Number of times a map divides counties into different congressional districts
| Compact (borders) | 380 |
| Current | 621 |
| Proportional | 659 |
| Competitive | 661 |
| GOP gerrymander | 734 |
| Majority minority | 777 |
| Dem. gerrymander | 892 |
| Compact (algorithmic) | 1,660 |
Compactness rank
Rank by the total length of district boundaries, from shortest to longest
| Compact (borders) | 1 |
| Compact (algorithmic) | 2 |
| Competitive | 3 |
| Proportional | 4 |
| GOP gerrymander | 5 |
| Majority minority | 6 |
| Dem. gerrymander | 7 |
| Current | 8 |
Breaking down the maps by race
The number of districts by majority racial or ethnic group and the projected number of nonwhite representatives, based on election results since 2006
| Majority-nonwhite districts | ||||||||
|---|---|---|---|---|---|---|---|---|
| Map | Majority-white districts | African-American | Hispanic/Latino | Asian/Pacific Islander | Coalition | All | Majority-nonwhite districts | Projected nonwhite House members |
| Majority minority | 292 | 37 | 41 | 4 | 61 | 143 | 94.8 | |
| Proportionally partisan | 342 | 22 | 31 | 0 | 40 | 93 | 86.2 | |
| Current | 340 | 19 | 30 | 1 | 45 | 95 | 85.7 | |
| Democratic gerrymander | 337 | 25 | 31 | 1 | 41 | 98 | 85.4 | |
| Republican gerrymander | 345 | 23 | 32 | 0 | 35 | 90 | 84.6 | |
| Highly competitive | 344 | 21 | 30 | 0 | 40 | 91 | 81.2 | |
| Compact (borders) | 343 | 10 | 19 | 1 | 62 | 92 | 78.3 | |
| Compact (algorithmic) | 346 | 8 | 24 | 1 | 56 | 89 | 76.2 | |
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