Early in-person voting has begun in Iowa, the first swing state to open polling sites.
Residents of the battleground state can now vote in person at their local county auditors' offices or turn them in by mail. Some areas will offer additional satellite locations.
At the Polk County Auditor's office in downtown Des Moines Thursday morning, a line of voters stretched down the block as the door opened.
Peter Clay, 62, was among the many supporters of President Obama. He says he's volunteered for the campaign on his days off from his job as a zookeeper.