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More than 40 national Catholic leaders and prominent theologians at universities across the country released a strongly worded open letter today urging “our fellow Catholics Newt Gingrich and Rick Santorum to stop perpetuating ugly racial stereotypes on the campaign trail.”

In the lead up to Saturday’s primary in South Carolina, Newt Gingrich has frequently blasted President Obama as a “food stamp president” and implied that some African Americans are more content to collect welfare benefits than work. Rick Santorum attracted scrutiny for telling Iowa voters he doesn’t want “to make black people’s lives better by giving them somebody else’s money.”

The open letter reminds the two presidential candidates, vying for Christian conservative voters, that U.S. Catholic bishops have called racism an “intrinsic evil” and consistently defend vital government programs such as food stamps and unemployment benefits that help struggling Americans.