“Ronald Reagan, who, as I recall, is not accused of being a tax-and-spend socialist, understood repeatedly that when the deficit started to get out of control, that for him to make a deal, he would have to propose both spending cuts and tax increases. Did it multiple times. He could not get through a Republican primary today.”
– President Barack Obama, at a meeting of the Newspaper Association of America

And not only Reagan. Romney, Santorum, Gingrich and Paul can’t get through Republican primary either.