Photos: Super Tuesday, busiest day of the 2016 primary campaign

Photo Galleries

Tess, a Basset Hound and Collie mix, looks up at voters as her owner Lindsay Greco, right, casts her ballot in the Georgia primary election at a polling site in a firehouse Tuesday, March 1, 2016, in Atlanta. (AP Photo/David Goldman)

It’s the busiest day of the 2016 primary campaign, with a quarter of Americans having their say.