And then, there is Taiwan, the issue administration officials and national security experts agree is most likely to tip the scales from power struggle to military conflict. At the White House, the State Department and the Pentagon, officials are trying to figure out if the longtime American policy of “strategic ambiguity” — providing political and military support to Taiwan, while not explicitly promising to defend it from a Chinese attack — has run its course. Pentagon officials say the matter could come to a head within six years.
On Russia, Mr. Biden will certainly be tougher than his predecessor, President Donald J. Trump, who ceded to President Vladimir V. Putin on several fronts. In particular, Mr. Biden has pressed the issue of Russia’s interference in American elections and warned in a speech in July that cyberattacks emanating from Russia could lead to a “real shooting war with a major power.”
He has also taken a tougher line than Mr. Trump in backing allies against Russia. But there again, Mr. Biden has set a stage for diplomacy bolstered by potential American force.
President Volodymyr Zelensky of Ukraine finally got the Oval Office visit he had been wanting on Wednesday, after his efforts to secure such a meeting with Mr. Trump became entangled in an episode that led to Mr. Trump’s first impeachment trial.
Mr. Biden assured Mr. Zelensky that the United States remained opposed to Russian aggression in the region. The messy exit from Afghanistan, however, has left Ukraine and other European allies fearful that their reliance on American power might be misplaced.
The European Union’s foreign policy chief, Josep Borrell Fontelles, described the departure as “a catastrophe for the Afghan people, for Western values and credibility and for the developing of international relations.’’
Understand the Taliban Takeover in Afghanistan
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Who are the Taliban? The Taliban arose in 1994 amid the turmoil that came after the withdrawal of Soviet forces from Afghanistan in 1989. They used brutal public punishments, including floggings, amputations and mass executions, to enforce their rules. Here’s more on their origin story and their record as rulers.
Who are the Taliban leaders? These are the top leaders of the Taliban, men who have spent years on the run, in hiding, in jail and dodging American drones. Little is known about them or how they plan to govern, including whether they will be as tolerant as they claim to be. One spokesman told The Times that the group wanted to forget its past, but that there would be some restrictions.
Not lost on America’s allies is the fact that, for all of the criticism Mr. Biden has received for the Afghan withdrawal, the American public still supported it.