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Florida’s Democratic Party filed, then quickly settled, a lawsuit over long early voting lines at several polling locations.

In Ohio, outside groups filed a court challenge over a directive from state Secretary of State Jon Husted saying early voters should show identification or write down the last four numbers of their Social Security numbers.

In Virginia, election officials were warning people to ignore any phone calls saying they could vote by phone.

The Virginian-Pilot of Norfolk reported that there were lines of more than 300 people at one polling place early Tuesday because of voting-machine problems.

Meanwhile, the Organization for Security and Cooperation in Europe (OSCE), the world’s largest regional security organization, sent 44 observers to watch the general election at the request of the U.S. government. The observers, part of the Office for Democratic Institutions and Human Rights, came from 23 countries.

• Staff writer Chuck Neubauer contributed to this article.