Barack Obama has been elected president of the United States by a large majority in the Electoral College. The Democrats have dramatically increased their control of Congress, increasing the number of seats they hold in the House of Representatives and moving close to the point where - with a few Republican defections - they can have veto-proof control of the Senate. Given the age of some Supreme Court justices, Obama might well have the opportunity to appoint at least one and possibly two new justices. He will begin as one of the most powerful presidents in a long while.

Truly extraordinary were the celebrations held around the world upon Obama’s victory. They affirm the global expectations Obama has raised — and reveal that the United States must be more important to Europeans than the latter like to admit. (We can’t imagine late-night vigils in the United States over a French election.)

Obama is an extraordinary rhetorician, and as Aristotle pointed out, rhetoric is one of the foundations of political power. Rhetoric has raised him to the presidency, along with the tremendous unpopularity of his predecessor and a financial crisis that took a tied campaign and gave Obama a lead he carefully nurtured to victory. So, as with all politicians, his victory was a matter of rhetoric and, according to Machiavelli, luck. Obama had both, but now the question is whether he has Machiavelli’s virtue in full by possessing the ability to exercise power. This last element is what governing is about, and it is what will determine if his presidency succeeds.

Embedded in his tremendous victory is a single weakness: Obama won the popular vote by a fairly narrow margin, about 52 percent of the vote. That means that almost as many people voted against him as voted for him.

Obama’s Agenda vs. Expanding His Base

U.S. President George W. Bush demonstrated that the inability to understand the uses and limits of power can crush a presidency very quickly. The enormous enthusiasm of Obama’s followers could conceal how he — like Bush — is governing a deeply, and nearly evenly, divided country. Obama’s first test will be simple: Can he maintain the devotion of his followers while increasing his political base? Or will he believe, as Bush and Cheney did, that he can govern without concern for the other half of the country because he controls the presidency and Congress, as Bush and Cheney did in 2001? Presidents are elected by electoral votes, but they govern through public support.

Obama and his supporters will say there is no danger of a repeat of Bush — who believed he could carry out his agenda and build his political base at the same time, but couldn’t. Building a political base requires modifying one’s agenda. But when you start modifying your agenda, when you become pragmatic, you start to lose your supporters. If Obama had won with 60 percent of the popular vote, this would not be as pressing a question. But he barely won by more than Bush in 2004. Now, we will find out if Obama is as skillful a president as he was a candidate.

Obama will soon face the problem of beginning to disappoint people all over the world, a problem built into his job. The first disappointments will be minor. There are thousands of people hoping for appointments, some to Cabinet positions, others to the White House, others to federal agencies. Many will get something, but few will get as much as they hoped for. Some will feel betrayed and become bitter. During the transition process, the disappointed office seeker — an institution in American politics — will start leaking on background to whatever reporters are available. This will strike a small, discordant note; creating no serious problems, but serving as a harbinger of things to come.

Later, Obama will be sworn in. He will give a memorable, perhaps historic speech at his inauguration. There will be great expectations about him in the country and around the world. He will enjoy the traditional presidential honeymoon, during which all but his bitterest enemies will give him the benefit of the doubt. The press initially will adore him, but will begin writing stories about all the positions he hasn’t filled, the mistakes he made in the vetting process and so on. And then, sometime in March or April, things will get interesting.

Iran and a U.S. Withdrawal From Iraq

Obama has promised to withdraw U.S. forces from Iraq, where he does not intend to leave any residual force. If he follows that course, he will open the door for the Iranians. Iran’s primary national security interest is containing or dominating Iraq, with which Iran fought a long war. If the United States remains in Iraq, the Iranians will be forced to accept a neutral government in Iraq. A U.S.