In the formative days of the Republic the directing influence of the Bible exercised upon the fathers of the Nation is conspicuously evident…We cannot read the history of our rise and development as a Nation, without reckoning with the place the Bible has occupied in shaping the advances of the Republic.
– Franklin Delano Roosevelt (1882-1945), 32nd president of the United States
Why do Democrats not speak this way anymore?
Source: U-Turn: Restoring America to the Strength of its Roots by David Barton and George Barna, Frontline, 2014, page 161.
For an extensive list of quotes like this from American leaders, see Historic Quotes About the Bible.