Supreme Court Justice Antonin Scalia addresses a gathering in McLean, Va., in 2006. Scalia was a devout Roman Catholic, but said, "The only article in faith that plays any part in my judging is the commandment, 'Thou Shalt Not Lie.'" Alex Wong/Getty Images hide caption

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Pope Francis waves from the popemobile upon arrival in Ecatepec — a rough, crime-plagued Mexico City suburb — on Sunday. Pope Francis has chosen to visit some of Mexico's most troubled regions during his five-day trip to the country. Yuri Cortez/AFP/Getty Images hide caption

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An American flag flies at half staff outside the U.S. Supreme Court after the death of Justice Antonin Scalia. The fight to replace him could be historic, resulting in the longest vacancy in history. Brenda Smialowski/AFP/Getty Images hide caption

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President Barack Obama speaks on the death of Supreme Court justice Antonin Scalia in Rancho Mirage, Calif., on Saturday. Scalia, 79, died Saturday, in Texas. Obama will be nominating a replacement. Mandel Ngan/AFP/Getty Images hide caption

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