Even before the US enacted a national shutdown due to the Covid-19 pandemic, Dr. Anthony Fauci pondered whether he might have testified before Congress more than any other official.

As the longtime face of the government’s infectious disease response, he was on Capitol Hill roughly 250 times over the course of his career to discuss threats such as the HIV/AIDS crisis and Ebola.

On Wednesday, the retired scientist will notch one more testimony, in what is expected to be a combative hearing before the Senate Homeland Security and Government Affairs Committee.

The appearance will mark the latest showdown with Sen. Rand Paul, the committee’s chairman, who has long sought to blame the Covid pandemic and shortcomings of the US response on Fauci.

Fauci did not agree to turn up willingly. In June, Paul subpoenaed the 85-year-old former head of the National Institute of Allergy and Infectious Diseases for his appearance.