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.

Jared Looney is a church planter involved in house churches in the Bronx, N.Y. He is part of MetroSoul, a cooperative organization of church organizations and church planters working to plant simple churches throughout the New York metropolitan area. He blogs at Urban Ekklesia.

Robert Fitts is a church planter and author of The Church in the House: A Return to Simplicity (Preparing the Way Publishers, 2001). He lives in Kailua-Kona, Hawaii.

Frank Viola is the founder of Present Testimony Ministry and the author of several books on house churches. He lives in Gainesville, Fla.