(FILES) US President George Bush (L) waves after announcing Robert Mueller (C) as his choice to be the new director of the FBI at a Rose Garden ceremony at the White House in Washington, DC, on July 5, 2001. Mueller, the former FBI director who led a politically explosive investigation into President Donald Trump, has died aged 81, US media reported on March 21, 2026. (Photo by EMILIE SOMMER / AFP via Getty Images)

(FILES) Former Special Counsel Robert Mueller is sworn in for his testimony before the House Select Committee on Intelligence hearing on Capitol Hill in Washington, DC, July 24, 2019. Mueller, the former FBI director who led a politically explosive investigation into President Donald Trump, has died aged 81, US media reported on March 21, 2026. (Photo by SAUL LOEB / AFP via Getty Images)

(FILES) Former Special Prosecutor Robert Mueller testifies before Congress on July 24, 2019, in Washington, DC. Mueller, the former FBI director who led a politically explosive investigation into President Donald Trump, has died aged 81, US media reported on March 21, 2026. (Photo by SAUL LOEB / AFP via Getty Images)

(FILES) US President Barack Obama speaks with FBI Director Robert Mueller during a meeting at FBI Headquarters in Washington, DC, April 28, 2009. Mueller, the former FBI director who led a politically explosive investigation into President Donald Trump, has died aged 81, US media reported on March 21, 2026. (Photo by Saul LOEB / AFP via Getty Images)

(FILES) Former Special Prosecutor Robert Mueller (C) is sworn in for his testimony before Congress on July 24, 2019, in Washington, DC. Mueller, the former FBI director who led a politically explosive investigation into President Donald Trump, has died aged 81, US media reported on March 21, 2026. (Photo by Chip Somodevilla / POOL / AFP via Getty Images)

(FILES) Former Special Prosecutor Robert Mueller testifies before Congress on July 24, 2019, in Washington, DC. Mueller, the former FBI director who led a politically explosive investigation into President Donald Trump, has died aged 81, US media reported on March 21, 2026. (Photo by Andrew CABALLERO-REYNOLDS / AFP via Getty Images)

(FILES) FBI Director Robert Mueller testifies before the House Select Intelligence Committee on Capitol Hill in Washington, DC, on April 11, 2013. Mueller, the former FBI director who led a politically explosive investigation into President Donald Trump, has died aged 81, US media reported Saturday. (Photo by Saul LOEB / AFP via Getty Images)

(FILES) L-R: US President Barack Obama (L), Attorney General Eric Holder, Secretary of Homeland Security Janet Napolitano and Director of the Federal Bureau Investigation (FBI) Robert Mueller stand during the National Anthem at the National Peace Officers Memorial Service, an annual ceremony honoring law enforcement who were killed in the line of duty in the previous year, at the US Capitol in Washington, DC, May 15, 2013. Mueller, the former FBI director who led a politically explosive investigation into President Donald Trump, has died aged 81, US media reported Saturday. (Photo by Saul LOEB / AFP via Getty Images)