Colouring books for grown-ups have exploded in popularity in recent years. Befitting America’s hyper-polarised era, political anoraks have put a partisan spin on the pastime. Dave’s Redistricting is a web app developed by Dave Bradlee, a software engineer, that allows users to draw imagined electoral districts. Hobbyists can combine the relaxation of paint-by-numbers with the catharsis of destroying their political opponents in a fantasised redistricting process.