As his impeachment trial was getting underway in the Senate, President Trump gave a hat tip Thursday to his evangelical base by updating the federal guidance on prayer in public schools — an action that came on National Religious Freedom Day. The order is similar to a 2003 guidance on school prayer, but it establishes a state-mandated filing process for complaints against local schools and school districts. States must then send the federal government a list each year of local schools and districts that have "a policy that prevents, or otherwise denies participation in, constitutionally protected prayer," in public schools....