> At times, attempts to decipher the mood of the president and other heads of state felt akin to studying a very sophisticated and multilingual high school cafeteria.
For starters, there appeared to be cliques, with a grimacing Mr. Trump often on the outs. As leaders prepared for a so-called (and perhaps dysfunctional) family photo, Mr. Trump’s contemporaries walked ahead and chatted together while the president hung back with Recep Tayyip Erdogan, the Turkish president.