Former Alaska Governor Sarah Palin and South Carolina Senator Jim DeMint are two powerful conservative voices in Republican politics, but they seem to be coming at the race for the Republican presidential nomination from totally different angles. Jim DeMint took to the airwaves on The Laura Ingraham Show to warn former House Speaker Newt Gingrich -- and all of the other presidential candidates -- to tone down their campaign rhetoric in the Palmetto State. “I would encourage all of the candidates, ‘let’s just be as positive as we can.’ I know they’re frustrated if people run negative ads,” DeMint said....