Of course, a candidate must meet legal requirements before running for public office. This is a universally agreed upon concept which has been enumerated in laws in every nation, since the beginning of human civilization. However, for those who deeply examine the United States and how it has drifted from a constitutional republic to the corporate-financier oligarchy it is today, they might realize the futility of arguing over "President" Obama's qualifications for an office that has long been ceremonial, if not entirely theatrical.
The corporate-financier agenda transcends presidencies. From Reagan to Obama, US foreign and domestic policy has moved in a continuously linear direction toward increasing corporate-financial monopolies and eroding the role and sovereignty of the US Constitution and the people who are supposed to execute it. In 1991, "Neo-Conservative" war monger Paul Wolfowitz stated that the Middle East would be turned upside down and reordered in America's favor - ironically, this operation which has been piecemeal planned and executed year-by-year since then, is finally unfolding in its entirety under the supposedly "liberal" Obama administration.
Likewise, the seemingly "liberal" free-trade agreements pushed by Clinton, were expanded into the beginnings of the supernational Security and Prosperity Partnership of North America under the supposedly "conservative" Bush administration. Of course, the blueprints for the SPP or the geopolitical reordering of the Middle East weren't drawn up by presidential administrations nor committees amongst America's elected representatives, but rather by unelected corporate-funded think-tanks like the Council on Foreign Relations or the Brookings Institute. These think-tanks represent the collective interests of the largest corporations and financial institutions on earth and are the real, often obscure architects of both American and European foreign and domestic policy.
The only difference one can delineate then, is the brand of propaganda used during each supposedly ideologically differentiated political administration to sell this unipolar, unilateral, continuous agenda to the public as it creeps forward. But even upon examining each presidential administration, we are struck with names and affiliations of members who directly represent these corporate interests. To illustrate how entirely ineffectual and meaningless "Obama" is as a president, let's examine some key members of his administration and what their affiliations are.