Warren Throckmorton is associate professor of psychology at Grove City College, a Christian liberal arts school in Pennsylvania, and co-author of Getting Jefferson Right: Fact Checking Claims About Our Third President (2012).

Stephen Mansfield is the author of numerous books on religion and the presidency, including The Faith of Barack Obama and The Faith of George W. Bush. He has also written about the faith of other leaders, including Winston Churchill and Abraham Lincoln.

Read a Nov. 20, 2012, Religion News Service analysis about how the movie Lincoln has revived questions about that president’s faith. Via the Washington Post.

Read a Jan. 29, 2013, Huffington Post essay, “So We Are a Christian Nation?” in which the author explores the different Christian traditions present in American politics.

Read a Feb. 1, 2013, column at the Patheos website about the tension between Christian dominance and religious freedom in America.

Read a Feb. 7, 2013, CNN story, “Religion, readability and the presidency: a historic combination,” on the presidential tradition, from Washington to Obama, of invoking faith and the national purpose.

Read a Feb. 7, 2013, column from the journal Sightings on presidents’ use of religious references in their inaugural addresses.

President Obama delivered an address at the National Prayer Breakfast on Feb. 7, 2013. Read his full statement here.

This story, published on May 14, 2013, in the New York Times, explains how Vermont became the first state to pass a legislative measure allowing physicians to administer lethal drugs to terminally ill patients in May 2013.