‘From dark art to dark science’: the evolution of digital gerrymandering

It's easier than ever to carve US electoral districts to one party's benefit - but it's also easier to expose the practice

The first time Kim Brace drew electoral district maps for the state of Illinois, more than 40 years ago, things moved slowly.

He and his colleagues hung maps of the state on the walls in the office of the speaker of the state house of representatives. Someone would climb a ladder, moving different blocks of people into different districts while another took notes below. In the evenings, they would go to the largest bank in Springfield and use a mainframe computer to generate a daily report. Over the course of the four-month legislative session, Brace was able to draw about 10 possibilities for electoral maps.