This strikes me as pretty damaging to Obama's prospects:

Democratic presidential candidate Hillary Rodham Clinton is expanding her lead in California as excitement for Illinois Sen. Barack Obama is fading among Golden State voters, a new Field Poll revealed Thursday.

The New York senator held a commanding lead over the Democratic field, with 49 percent support to 19 percent for Obama and 10 percent for former North Carolina Sen. John Edwards...

In the last state Field Poll, Obama led Clinton 39 percent to 38 percent among voters between the ages of 18 and 39. In the new poll, Clinton led him among the younger voters by 47 percent to 24 percent.

Meanwhile, she expanded her support among male Democrats from 41 percent in March to 47 percent in the latest poll taken Aug. 3-12.

The California poll results were similar to a recent national Gallup Poll, in which Clinton led among Democrats with 48 percent support to 16 percent for Obama and 12 percent for Edwards.

Her strategy is to be the overwhelming favorite. It's working.

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