(From L) Chairman of the Joint Chiefs of Staff General Dan Caine, US Secretary of Defense Pete Hegseth and US deputy national security advisor Michael Needham listen to US President Donald Trump as he hosts Stephen Hubbard in the Oval Office of the White House in Washington, DC, on October 30, 2026. Hubbard, a retired US teacher, returned to the United States on October 22, 2026, after being released by Russia following four years in Russian prison. He was sentenced to almost seven years in prison, accused of acting as a "mercenary" for Kyiv. He denies the charges. (Photo by Alex WROBLEWSKI / AFP via Getty Images)

(From L) White House Chief of Staff Susie Wiles, chairman of the Joint Chiefs of Staff General Dan Caine, US Secretary of Defense Pete Hegseth, US deputy national security advisor Michael Needham listen to US President Donald Trump as he hosts Stephen Hubbard in the Oval Office of the White House in Washington, DC, on October 30, 2026. Hubbard, a retired US teacher, returned to the United States on October 22, 2026, after being released by Russia following four years in Russian prison. He was sentenced to almost seven years in prison, accused of acting as a "mercenary" for Kyiv. He denies the charges. (Photo by Alex WROBLEWSKI / AFP via Getty Images)

US Vice President JD Vance listens to US President Donald Trump as he hosts Stephen Hubbard in the Oval Office of the White House in Washington, DC, on October 30, 2026. Hubbard, a retired US teacher, returned to the United States on October 22, 2026, after being released by Russia following four years in Russian prison. He was sentenced to almost seven years in prison, accused of acting as a "mercenary" for Kyiv. He denies the charges. (Photo by Alex WROBLEWSKI / AFP via Getty Images)

US Vice President JD Vance listens to US President Donald Trump as he hosts Stephen Hubbard in the Oval Office of the White House in Washington, DC, on October 30, 2026. Hubbard, a retired US teacher, returned to the United States on October 22, 2026, after being released by Russia following four years in Russian prison. He was sentenced to almost seven years in prison, accused of acting as a "mercenary" for Kyiv. He denies the charges. (Photo by Alex WROBLEWSKI / AFP via Getty Images)

US President Donald Trump speaks alongside Stephen Hubbard (L) in the Oval Office of the White House in Washington, DC, on October 30, 2026. Hubbard, a retired US teacher, returned to the United States on October 22, 2026, after being released by Russia following four years in Russian prison. He was sentenced to almost seven years in prison, accused of acting as a "mercenary" for Kyiv. He denies the charges. (Photo by Alex WROBLEWSKI / AFP via Getty Images)

US President Donald Trump speaks alongside Stephen Hubbard (L) in the Oval Office of the White House in Washington, DC, on October 30, 2026. Hubbard, a retired US teacher, returned to the United States on October 22, 2026, after being released by Russia following four years in Russian prison. He was sentenced to almost seven years in prison, accused of acting as a "mercenary" for Kyiv. He denies the charges. (Photo by Alex WROBLEWSKI / AFP via Getty Images)

US President Donald Trump speaks alongside Stephen Hubbard (L) in the Oval Office of the White House in Washington, DC, on October 30, 2026. Hubbard, a retired US teacher, returned to the United States on October 22, 2026, after being released by Russia following four years in Russian prison. He was sentenced to almost seven years in prison, accused of acting as a "mercenary" for Kyiv. He denies the charges. (Photo by Alex WROBLEWSKI / AFP via Getty Images)

US President Donald Trump speaks alongside Stephen Hubbard (off frame) in the Oval Office of the White House in Washington, DC, on October 30, 2026. Hubbard, a retired US teacher, returned to the United States on October 22, 2026, after being released by Russia following four years in Russian prison. He was sentenced to almost seven years in prison, accused of acting as a "mercenary" for Kyiv. He denies the charges. (Photo by Alex WROBLEWSKI / AFP via Getty Images)