Just in from Reuters:

WASHINGTON — Democratic presidential hopeful Barack Obama surged to a big lead over Hillary Clinton in California hours before “Super Tuesday” voting began in 24 states, according to a Reuters/C-SPAN/Zogby poll released on Tuesday.

In the Republican race, former Massachusetts Gov. Mitt Romney held a 7-point advantage on Arizona Sen. John McCain in California, while McCain added to commanding double-digit leads in New York and New Jersey.

On a sprawling day of coast-to-coast voting, the biggest ever in a U.S. primary race, the U.S. presidential contenders in both parties were fighting to win a huge cache of delegates to this summer’s nominating conventions.

In California, which alone provides more than one-fifth of the Democratic delegates needed for the nomination, Obama led Clinton by 49 percent to 36 percent, the poll found. The margin of error was 3.3 percentage points.