New York Times: “Voting actually starts in less than six weeks, on Sept. 23 in Minnesota and South Dakota, the first of some 35 states and the District of Columbia that allow people to cast ballots at polling sites or by email before Nov. 8. Iowa is expected to have ballots ready by the end of September, as are Illinois and two other states.”
“The electoral battlegrounds of Arizona and Ohio are to begin voting on Oct. 12, nearly four weeks before Election Day. And North Carolina and Florida will be underway before Halloween.”