For decades—centuries, actually—elections were held on... wait for it... Election Day. People came in that day, voted, and went home. In 2024, 88,233,886 votes (58% of the total) were cast either by absentee ballot before Election Day or in-person before Election Day. With nearly three-fifths of the votes now cast before Election Day, what we have is now Election Month, more or less.
Based on the available data, it appears that 41% of the early votes were cast by Democrats, 38% by Republicans, and 21% by independents. It is clear that Donald Trump's warning not to vote by mail has not been heeded, since many of the early votes were absentee. It is not surprising that independents did not vote as heavily early on as partisans because many of them did not make up their minds until "Election Day." (V)