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His campaign slogan was, "Yes we can." Now the question is "Will he?".
President-elect Barack Obama faces a daunting list of challenges on the political, social and economic horizons.
Now that the celebrations in the United States, and around the world, have quietened down, reality has set in.
America is involved in two ongoing wars and is suffering from a major financial crisis at home. Obama has a mandate for change, and a Democratic majority in both houses of Congress.
But the questions remain: How much change can we expect? And just how much has America been renewed with these elections?
On Thursday's Riz Khan we speak to great American thinker Howard Zinn.
In the closing days of the election race he endorsed Barack Obama, after initially urging voters to vote for third-party candidate Ralph Nader in states that were solidly Democratic.
Zinn is an award-winning historian, political scientist, playwright, activist, lecturer, and prominent anti-war critic.
He is also Professor Emeritus of Political Science at Boston University, a prolific writer, and author of 20 books including, A People's History of the United States.
You can join the debate. Send your questions and comments for Howard Zinn.
Watch the show live at 0030GMT, with repeats at 05:30GMT and 2030.