Xinhua news agency has marked US President Donald Trump's first 100 days in office with a commentary accusing him of embarking on a foreign policy of coercion under his "America First" doctrine and turning the country into the world's super-bully.

The commentary said in an era marked by pressing global challenges, the world had expectations of major countries, notably the United States.

Xinhua noted that since Trump's return to the White House, Washington had repeatedly shocked and awed the world – a reference to the United States' "shock and awe" campaign in the 2003 Iraq war.

It said Washington had threatened to annex foreign territories and arbitrarily imposed so-called "reciprocal tariffs" on its trading partners.

It said this "calculated scheme has backfired, not only provoking widespread opposition and damaging the credibility of the US greenback and debts but also roiling US and global markets and creating great uncertainties for global businesses and consumers.

"Moreover, numerous experts and surveys show that manufacturing won't return to the United States because of higher tariffs."

Xinhua said Washington had evaded international responsibilities by withdrawing again from the World Health Organization and the Paris Climate Accord, and by slashing its role in international development aid programmes under the pretext of cutting waste and streamlining the government.

Xinhua said despite Trump's repeated promises to end the Ukraine war "within 24 hours" of taking office, Washington had failed to accomplish meaningful progress over the past three months while still scrambling to go after Ukraine's mineral wealth.

The commentary ended with the observation that "to 'Make America Great Again', the United States should start with looking inward and doing some serious soul-searching, instead of acting like the world's bully, driven by a mounting fear over its declining global supremacy." (Xinhua)