Former CNN anchor Lou Dobbs, pondering a future in politics, is trying to wipe away his image as an enemy of Latino immigrants by positioning himself as a champion of that fast-growing ethnic bloc.

Mr. Dobbs, who left the network last week, has said in recent days that he is considering a third-party run for a New Jersey Senate seat in 2012, or possibly for president. Polls show voters unhappy with both parties, and strategists believe Mr. Dobbs could tap populist anger over economy issues just as Ross Perot did in the 1990s.

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