An in-depth look at ES&S, which controls around 50% of the US voting machine market and retained its position over the years despite several mishaps (Jessica Huseman/ProPublica)

Jessica Huseman / ProPublica:
An in-depth look at ES&S, which controls around 50% of the US voting machine market and retained its position over the years despite several mishaps  —  ProPublica is a nonprofit newsroom that investigates abuses of power.  Sign up for ProPublica's Big Story newsletter to receive stories …