Here is a quote from Newt Gingrich given to the NYTimes by a friend of his. At the time that he was divorcing his first wife, Jackie, who had been his high school geometry teacher.
" A few weeks before Mr. Gingrich filed for divorce, he called his political aide and friend Mr. Carter to talk about his marriage. Mr. Carter said he and other friends had been worried that the marriage was falling apart. Mr. Gingrich told him why he wanted a divorce. "He said: 'She's not young enough or pretty enough to be the wife of a President. And besides, she has cancer.' It sounds harsh and hokey, but anyone who knows him knows it's perfectly consistent with the kinds of things he says." Read the whole article here: http://www.nytimes.com/1994/11/24/us/gin…
The article goes on to report that Gingrich did not pay either alimony or child support, despite the fact that Jackie had paid for his education and supported him through the first years of their marriage. Friends had to take up a collection to help her provide for her children at that time.
Six months after the infamous hospital room meeting following Jackie's surgery to treat uterine cancer, he was married to Marianne Gingrich, who, recently diagnosed with MS, would similarly have been unable to cut the muster as First Lady.