Voting rights groups sued the Texas Department of Public Safety and the secretary of state over delayed voter registrations that overwhelmed local election workers.

© Christopher Lee for The New York Times

A majority of Americans cast their ballots before Election Day, but early-voting data is limited in how much it can tell us about important races.

© The New York Times

Signs are emerging that dispirited Republican voters may stay home in November, bringing a Democratic surge without many conversions.

© Jamie Kelter Davis for The New York Times

Different blocs are moving left. They could swing key Senate races.

© Ellen Schmidt/Associated Press