The first polls started closing Tuesday in the US presidential elections, as some of the stations in Kentucky and Indiana shut down. Other stations in those two states would close at 7 pm (0000 GMT), DPA reported.
After months of fierce campaigning, President Barack Obama, a Democrat, and Republican Mitt Romney were separated by only a razor-thin margin in the polls.
Romney made a last-minute stop Tuesday in Pennsylvania, whose large number of electoral votes - 20 - would be a prize in the state that normally votes Democratic, but has a large number of conservative voters.
Obama relaxed in Chicago, playing basketball according to one of his campaign traditions.