One issue that Bill and Hillary Clinton cannot come to an agreement on is whether it would be good for the United States to become a multicultural society—the same question that has become a hot button issue in the Republican primary.
Speaking in 2007, the former president explained that he had "one heck of a fight" with his wife on the issue after they each read Arthur Schlesinger's The Disuniting of America: Reflections on a Multicultural Society, which warns that the United States' days as a melting pot are coming to an end.
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What side of the argument each were on, however, remains unclear.
"If she were not running for office, I would tell you which side she took," said Bill Clinton at the time, referring to her failed 2008 presidential campaign.
Hillary Clinton has indicated during her current campaign that immigrants should not feel the need to assimilate in the United States, urging immigrant parents to speak to their children in their "native languages" rather than in English.
It is possible that although the Clintons may have disagreed in 2007, Hillary Clinton's beliefs on the issue of multiculturalism have evolved in a way similar to how she claims her beliefs on the issue of gay rights have.
Bill Clinton revealed to a close friend near the end of his time in the White House that Hillary Clinton had a "general discomfort" with gay rights issues and did not enjoy being "around gay people who were kind of acting out," according to an audio recording found by the Washington Free Beacon.
Bill Clinton did not share her feelings on the issue.
"Hillary, emotionally speaking, still finds the issue harder to swallow than I do," Bill Clinton said, according to the audio account. "Generally I support the gay agenda right down the line."