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Tonight's debate

McClatchy curtain-raises the debate, which will feature a number of African-American journalists focusing on concerns of African-American voters. And the story notes that, to date, Clinton and Obama have split the black vote in polls.

Massachusetts Gov. Deval Patrick (D) will introduce the Democratic candidates, his first step into the national spotlight. He has not decided whom he'll endorse, though it's speculated he's leaning towards Obama.