With four days remaining until election day, the Democratic presidential contest in California has boiled down to a battle for delegates between Sens. Hillary Rodham Clinton and Barack Obama.
California, with 441 delegates at stake, is the biggest single prize in the nation's presidential primary, but don't look for either candidate to make a clean sweep Tuesday.
Unlike the Republicans, the Democratic Party does not allow winner-take-all primaries, which can allow a front-runner to quickly dominate the field. Instead, the party's complex rules for allocating delegates somewhat favors the second-place finisher.
Both campaigns are focusing their efforts on maximizing their delegates -- Clinton by building a strong statewide organization and Obama by targeting certain parts of the state.
"This is turning out to be an incredible, very exciting primary," said veteran Democratic campaign manager Darry Sragow, who is not aligned with a candidate. "I think the voters are engaged and fascinated."
That may be true -- polls certainly indicate a high level of interest -- but the process for allocating delegates might leave some people baffled too.
Of the 441 delegates that the state will send to the Democratic convention in Denver this summer, 71 are so-called super-delegates who have a vote by virtue of the office they hold.
Of the remaining 370 delegates that will be allocated by voters, 241 will be divided among the state's 53 congressional districts and allocated to candidates based on the vote they receive.
But not all congressional districts are equal. Some will have as few as three delegates, some as many as six. The number depends on how heavily Democrats have turned out in the past.
In one peculiarity of the process, a candidate who wins by a big margin in one district could end up with fewer delegates than a candidate who wins by a narrow margin in another.
Deploying resources
For example, in a district with four delegates, a candidate who wins 62% of the vote would get two delegates -- so would a candidate who wins 38% of the vote.
But in a district with three delegates, a candidate who wins 50.1% of the vote would get two delegates, and a second-place finisher with 49.9% of the vote would get one.
In practical terms, this means that congressional districts with three or five delegates offer candidates a shot at a bonus -- the chance to pick up an extra delegate with a low margin of victory. The chance of picking up extra delegates in districts with four or six delegates is lower.
