Richardson Endorsement Sparks More Negative Campaigning in Clinton-Obama Race

Leading up to Pennsylvania, the Democratic presidential contest is getting nasty.

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Sen. Barack Obama smiles with New Mexico Gov. Bill Richardson.

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In response, Merrill "Tony" McPeak, a retired general who is a cochairman of Obama's campaign, said Bill Clinton was questioning Obama's patriotism and compared Clinton's tactics to those of Sen. Joseph McCarthy, who tried to link many Americans with communism in the 1950s.

This in turn caused Hillary spokesman Wolfson to call McPeak's comments "a deliberately pathetic misreading of what the president said."

Overall, an additional development has supercharged the debate—the controversial remarks of the Rev. Jeremiah Wright, Obama's pastor in Chicago, that many people considered anti-American and anti-white.