"So when you ask me whether I listen to Dr. Fauci's advice, my answer is: only with skepticism and caution," Navarro concluded after detailing a list of his concerns with Fauci in an op-ed titled "Anthony Fauci Has Been Wrong About Everything I Have Interacted with Him On" in USA Today.

Navarro wrote that he pushed the president to take the coronavirus threat seriously and level a travel ban on flights from China in January.

"Fauci fought against the president's courageous decision — which might well have saved hundreds of thousands of American lives," Navarro wrote.

Navarro said Fauci also told the news media in January "not to worry" about a possible pandemic and described the virus threat as "low risk."

"When we were building new mask capacity in record time, Fauci was flip-flopping on the use of masks," he wrote, referring to the doctor's recommendation not to wear masks at the beginning of the pandemic.

Navarro also challenged Fauci for dismissing hydroxychloroquine as a way to fight the virus despite scientific studies showing its success.