Democratic presidential candidates Barack Obama and Hillary Clinton square off tonight in another debate. It's being held in a gym at the University of Texas at Austin.

Both candidates have been crisscrossing the state in advance of the March 4th, delegate-rich Texas primary.

Obama leads in the overall hunt for delegates to next summer's nominating convention. He's won the last 11 state contests in a row.

The Associated Press delegate count shows Obama in front with 1,351 delegates to Clinton's 1,262. It takes 2,025 delegates to win the Democratic nomination.

HERE

Wed Feb 20, 10:51 PM ET

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Democratic presidential hopeful, Sen. Hillary Rodham Clinton, D-N.Y., addresses the crowd at the University of Texas at Brownsville and Texas Southmost College in Brownsville, Texas, Wednesday, Feb. 20, 2008.

(AP Photo/Carolyn Kaster)