The story

Sens. Hillary Clinton and Barack Obama face off Tuesday in the last contests of the Democratic primary season, bringing an end to a historic race that has produced months of excitement, but still no nominee.

The road to the nomination has been fierce. The two have endured preacher-gate, Bosnia-gate, a bitter battle over the race card and other controversies that have framed this race.

From a crowded field of Democratic candidates taking the stage for a debate a year ago to the final two nominating contests that few thought would be contested, Obama and Clinton have battled it out to the end.

Clinton has become the favored candidate among working-class voters, women and the elderly, while Obama has emerged as the choice for well-educated, affluent voters, African-Americans and the younger crowd.

The contests come to an end Tuesday, exactly five months after a much wider field faced off in Iowa's first-in-the nation caucuses. Read full article »

CNN Political Editor Mark Preston contributed to this report

All About U.S. Presidential Election • Democratic Party