Column: Joe Biden Faces a World That Will Be Wary of U.S. Leadership

For four years, Donald J. Trump has kept both U.S. foes and allies off-balance with his “America first” approach to global politics. For a world that had grown accustomed to the U.S. as rule-maker rather than rule-breaker of the international order, Trump’s embrace of “What have you done for us lately?” international relations was understandably jarring. But it also served to open up new frontiers in U.S. foreign policy.