WASHINGTON (Reuters) - Mitt Romney has distanced himself from his remarks lamenting the nearly 47 percent of Americans who do not owe federal income taxes, but his fellow Republicans helped engineer the very tax breaks that have put many in that category. And little change is expected soon. A key reason: The breaks in question - the earned income tax credit and the child tax credit - are based on core Republican philosophies of encouraging work to lift people out of poverty, Republican aides and many conservatives say. ...

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