"I am Barack Obama, President of the United States -- AMA"
(Scroll down for his responses)
Reddit moderators and administrators quickly confirmed it was actually Obama in the comment thread, and Obama himself posted on his verified campaign Twitter account that it was indeed him.
The IAmA Reddit series allows Reddit users to ask questions of people from many walks of life, as seen here, and vote up their favorite questions and responses. It is a crowd-sourced Q&A of sorts hosted by the Internet.
The Washington Post reports that Obama is hosting the Q&A during a campaign stop in the same city Reddit was born in 2005 -- Charlottesville, Va.