Republicans Mitt Romney and Rick Perry are tangling over how they outlined plans for health care and Social Security in their books.
Romney says the Texas governor said in his recent book, "Fed Up," that the federal government shouldn't be involved in pensions. Romney is a former Massachusetts governor who says Social Security is a responsibility of the federal government, not the states.
Perry says he has made a "solemn oath" to protect Social Security for seniors. He says his book offered state-run pension programs as an option.
Perry countered by accusing Romney of changing his views on the merits of the Massachusetts health care plan in different versions of his book. Romney said he "said no such thing" and the Massachusetts plan was "a state plan for a state."