WASHINGTON (Reuters) - Sporadic complaints about voting procedures surfaced from Pennsylvania to Florida on Tuesday, while long lines in many states posed their own challenges in what could be one of the closest presidential elections in U.S. history.
It was unclear what impact controversies over everything from the presence of poll watchers to software installation on tabulation machines would eventually have on an election that caps the long and bitter presidential campaign. National opinion polls showed President Barack Obama and Republican challenger Mitt Romney in a virtual dead heat.