The United States is facing great pressure from rivals and allies on the international arena, Covid-19 made that challenge more serious.

Before Covid-19 attacked, the United States faced many challenges and it was difficult to fulfill its international commitments.

In Hill's analysis, Raphael S. Cohen, an expert at RAND Corporation Research Institute based in California, USA, said whether Donald Trump or Joe Biden were elected later this year, geopolitical factors make it so.

During his tenure, Trump worried both his allies and his partners, by repeatedly withdrawing from international treaties, threatening to leave NATO, or asking Japanese and Korean allies to share a heavy financial burden.

A survey in 32 countries of the Pew Research Center found that 64% of respondents said they did not believe Trump "handled well" with international issues.

In addition, the push by Russia and China to promote the international aid campaign against Covid-19, while the US acts relatively little, could also cause Washington to lose more and more support.

"Even when Biden became president, America's international challenges did not disappear," Cohen said.

"Covid-19 only added tension to Washington's alliances, when many countries, including the United States, had to place their national interests above the interests of their allies," Cohen said.

By the end of the Cold War, the United States and its Asian and European allies accounted for more than three-fourths of global GDP.

Meanwhile, the US rivals rose and accounted for 30% of global GDP.

Cohen thinks that Covid-19 could fuel this trend.

"In other words, the economic dominance of the United States and its allies, which can help strengthen military power, will decline. Even if the US economy can recover its strong growth momentum, the

The security challenges facing the US are also increasingly diverse.

For many American strategists, the challenge now is not how to compete with which major powers, or to engage in the fight against terrorism, but how to perform all of the above tasks.

"It is important that there are no indications that any of these challenges will disappear as the world is fighting Covid-19. In contrast, five American rivals seem to be trying to make ends meet.

In addition to the main challenges, the US post-Covid-19 foreign policy may be subject to a variety of external influences.

Sharing information between countries increasingly easily, regardless of its accuracy, plus the critical role of public opinion in shaping policy, can also harm many US union activities.

"All of these factors can make the world more vulnerable to conflict and pose greater challenges to US leadership," Cohen said.

According to him, the question now for the US is not whether the next president will face a difficult situation strategically or not, but how to solve it.

"Before Covid-19, the foundation of American foreign policy was under more and more pressure. After Covid-19, this policy seems to have reached the breaking point," Cohen said.