WASHINGTON (Sputnik) — The states of Colorado, Montana, Wyoming, Nebraska, Utah and New Mexico opened polling sites at 9 a.m. EST (14:00 GMT).
An hour earlier, residents of Iowa, Alabama, Arizona, Kansas, Mississippi and Texas began voting, followed at 8:30 a.m. by Arkansas. The first polls to close will be in Indiana and Kentucky as of 6 p.m. EST, with results expected to start arriving soon thereafter.
The islands of western Alaska have the latest scheduled poll closing, at 1 a.m. EST on Wednesday.
In addition to choosing a new president, Americans on Tuesday will elect all 438 members of the House of Representatives, one-third of the Senate's 100 seats, legislators in 44 states, governors in 12 states, and a host of local officials.