When Saudi Arabia’s King Salman visited the White House on Friday, President Barack Obama did something that at least one news reporter characterized as “very unusual.” No, he did not bow again. After all, there’d be nothing unusual in that for Obama. But CBS News White House correspondent Mark Knoller took to social media to say the president appeared at the West Wing portico to personally welcome Salman: Obama’s behavior Friday was a far cry from how the Dali Lama was treated when visiting the White House in 2010, when the spiritual leader of Tibet was forced to exit through...