President Barack Obama said religious freedom is under threat, and highlighted the plight of two American Christians held in North Korea and Iran. In his address to the National Prayer Breakfast, an annual gathering of lawmakers and numerous faith leaders, Mr. Obama said it’s clear that “around the world freedom of religion is under threat.” He said the U.S. works with countries that don’t live up to America’s standard of religious tolerance and pointed to China as an example. He said America’s relationship with the Chinese is important to the world but said that he stresses in meetings with Chinese...