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.

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.

Shamash, a project of Hebrew College Online, maintains a kosher database and information on Jewish books, the Holocaust and the Tanakh, or Hebrew Bible. It includes links to all things Jewish on the Internet.