John Fea is an American history professor at Messiah College in Grantham, Pennsylvania. Fea writes often about the role of religious leaders in the Trump administration and is the author of Believe Me: The Evangelical Road to Donald Trump.

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 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.

An October 2009 Religion News Service story, posted at Crosswalk.com, discusses the issuing of a “digital fast,” and it includes links to columns by Christian leaders discussing the pros and cons of social networking.

Observing a “fast” from Facebook and Twitter and even email is becoming a popular spiritual practice — at Lent, for example — as shown by this National Public Radio story from March 2009.

Observing a “fast” from Facebook and Twitter and even email is becoming a popular spiritual practice — at Lent, for example — as shown by this Star-Ledger story from March 2009.

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

Felipe Mesa has just started a house church in Taneytown, Md.