SAM WANG

Gerrymandering is not hard. The core technique is to jam voters likely to favor your opponents into a few throwaway districts where the other side will win lopsided victories, a strategy known as “packing.” Arrange other boundaries to win close victories, “cracking” opposition groups into many districts.

Normally we would expect more seats in Congress to go to the political party that receives more votes, but the last election confounded expectations. Democrats received 1.4 million more votes for the House of Representatives, yet Republicans won control of the House by a 234 to 201 margin.

Gerrymandering is not hard. The core technique is to jam voters likely to favor your opponents into a few throwaway districts where the other side will win lopsided victories, a strategy known as “packing.” Arrange other boundaries to win close victories, “cracking” opposition groups into many districts.

Normally we would expect more seats in Congress to go to the political party that receives more votes, but the last election confounded expectations. Democrats received 1.4 million more votes for the House of Representatives, yet Republicans won control of the House by a 234 to 201 margin.