Barack Hussein Obama was elected the 44th president of the United States on Tuesday, sweeping away the last racial barrier in American politics with ease as the country chose him as its first black chief executive.
 

The election of Mr. Obama amounted to a national catharsis — a repudiation of a historically unpopular Republican president and his economic and foreign policies, and an embrace of Mr. Obama’s call for a change in the direction and the tone of the country.

But it was just as much a strikingly symbolic moment in the evolution of the nation’s fraught racial history, a breakthrough that would have seemed unthinkable just two years ago.

Mr. Obama, 47, a first-term senator from Illinois, defeated Senator John McCain of Arizona, 72, a former prisoner of war who was making his second bid for the presidency.