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RICHMOND (AP) --Virginia's biggest, most expensive political season with unprecedented attention from presidential candidates is coming to a conclusion.

President Barack Obama and Republican challenger Mitt Romney are in a toss-up race for the 13 electoral votes that both parties consider vital for victory. Polls are open in Virginia from 6 a.m. to 7 p.m. Tuesday.

In the campaign's final week, both candidates and their A-list surrogates have blanketed Virginia, which for 40 years was a reliably Republican afterthought in presidential politics.

Long lines and some glitches are being reported at precincts in Virginia as voters head to the polls to cast their ballots.

Polls opened at 6 a.m. Tuesday. Some voters began lining up at precincts in Hampton Roads and other areas as early as 4:30 a.m.

Power outages briefly disrupted voting at at least three polling places in Eastern Henrico. Dominion Power says all electricity was restored by 7:41 a.m.

In Spotsylvania, election official John Adams says one precinct had machines available only for one of two congressional districts. Additional machines were brought in.

The Grayson County Voter Registrar's office says a poll worker made a mistake setting up voting machines at one precinct.

Malfunctioning ballot counting machines were reported at a polling place in Newport News.

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