Trump, whose public approval ratings have fallen amid continued COVID-19 infection rates and economic woes, sought to shift the focus to Beijing, claiming again, without evidence, that it may have intentionally let the virus spread globally.

The Republican president, who is trailing Democrat Joe Biden in national polls ahead of the Nov. 3 election, said it was a “disgrace” that Beijing had limited the spread of the virus at home but allowed it to reach the rest of the world.

“What China did is a terrible thing … whether it was incompetence or on purpose,” he said, as his administration continued to crack down on Chinese firms and exports.

Biden on Wednesday said a Phase 1 U.S.-trade deal signed in January by the world’s two largest economies was “failing” after Commerce Department data showed the U.S.-China trade deficit widened 5% to $28.4 billion in June.

Trump signed an executive order Thursday aimed at yanking back supply chains from China for key ingredients and supplies used to make medicines and medical equipment.

Top advisers also have urged the president to delist Chinese companies that trade on U.S. exchanges and fail to meet U.S. auditing requirements by January 2022.

Already high tensions could spike further when starting Sunday Trump’s health secretary, Alex Azar, visits Taiwan, which Beijing considers a renegade province. China has already threatened “strong countermeasures.”

Azar will be the highest-level U.S. official to visit the island in four decades. Washington broke off official ties with Taipei in 1979 in favor of Beijing but is now moving to sell Taiwan at least four of its large sophisticated aerial drones