WASHINGTON — An overlooked voting machine, a fight over rules, faulty counts — the almost-impossibly close race for attorney general in Virginia once again has highlighted the errors that slip into U.S. elections.

The results in that extraordinarily tight race continued to change Monday, as Democrat state Sen. Mark Herring picked up 132 previously uncounted votes in Richmond that appeared to give him a slight edge over Republican state Sen. Mark Obenshain.

Obenshain had started the day with a 17-vote lead of out 2.2 million cast. But nearly a week after the Nov. 5 election, officials continued to discover uncounted votes during routine canvassing and said the contest, which appears almost certainly headed to a recount, could seesaw again.

The attorney general contest appears to be one of the closest in state history and could come down to the counting of provisional ballots.

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