Step 1: "Spoiling" ballots -- 1,389,231 of them. In the vote-count game, these are called "undervotes" and "overvotes." You can recognize these lost ballots by their hanging chads, punch cards without punches (an Ohio specialty), paper ballots eaten by scanners, and touch screens that didn't know you touched them.
Step 2: Rejecting "provisional ballots"-- 1,090,729 in this pile. Voters finding themselves at the "wrong" precinct, or wrongly "scrubbed" from voter rolls get these back-of-the-bus ballots first inaugurated in 2002. In '04, provisional ballots were passed out like candy to voters in the poorest precincts. They handed them out -- then threw them away -- one million dumped in all. In Ohio, Republican Secretary of State Kenneth Blackwell changed state rules, allowing him to toss out the ballots of legal voters who cast ballots in the wrong precinct although these citizens were told their vote would count after confirming their registration.
Step 3: Not counting absentee ballots -- 526,420 of them. At least, that's what we figure from official stats. But it's anyone's guess how many mailed-in votes were dumped. (However, in one case, in Palm Beach, Florida, Jeb Bush's candidate for Elections Supervisor, Theresa LaPore, counted more absentee votes than absentee ballots mailed in. Not the brightest bulb in the vote-fix biz, that Theresa.)
Step 4: Scrub'm, Purge'm, Block'm. These are the voters who never got to vote at all. This group includes those who found their registrations were never entered on the voter rolls. In Ohio, about one-fourth of those registered by Jesse Jackson's 2004 voter drive, found their registrations delayed beyond the election date or lost.