A routine political summit has become “a moment of trepidation and peril” as world leaders cast their gaze on the U.S. and a former president they are terrified might reclaim the White House, according to a new political analysis. The Washington Post’s foreign affairs columnist David Ignatius wrote Thursday about an upcoming NATO summit where he says President Joe Biden will carry the weight of the world on his shoulders. “A Donald Trump victory, many Europeans fear, could separate the United States from its European allies,” writes Ignatius. “What NATO touts as the world’s most successful mil…