The United States, unlike most developed countries, continues to use the marital couple as the taxable unit for its income tax. This continued use of the marital unit— like its original establishment —rests on cultural preferences. This Article suggests that the roles of marriage, religion and taxation in America are essential factors in America’s retention of the marital unit. Part I examines the distinctive contribution marriage — especially the traditional single-earner breadwinner marriage — makes to the political life of the country. Part II explores the similar role of religion. Part III describes some congressional efforts over the past two decades to aid, ostensibly, married couples through the income tax. Part IV concludes that although these actions have not been the most effective or efficient means of helping married couples, they nevertheless serve an important expressive purpose. Tax has been the arena for many political issues since the founding of the nation. Consequently, congressional actions and rhetoric regarding the income tax’s "marriage penalty" reinforce the marital unit/joint return and reaffirm — even if only symbolically — a national commitment to marriage as instrumental to American democracy.