WASHINGTON, DC - JUNE 18: Vice President J.D. Vance speaks during a news conference in the Brady Press Briefing Room at the White House on June 18, 2026 in Washington, DC. Vance is expected to travel to Lucerne, Switzerland tomorrow for follow up talks after a memorandum of understanding (MOU) to end the conflict between the United States and Iran was signed between U.S. President Donald Trump and Iranian President Masoud Pezeshkian. (Photo by Andrew Harnik/Getty Images)

WASHINGTON, DC - JUNE 18: Vice President J.D. Vance takes a question from a reporter during a news conference in the Brady Press Briefing Room at the White House on June 18, 2026 in Washington, DC. Vance is expected to travel to Lucerne, Switzerland tomorrow for follow up talks after a memorandum of understanding (MOU) to end the conflict between the United States and Iran was signed between U.S. President Donald Trump and Iranian President Masoud Pezeshkian. (Photo by Andrew Harnik/Getty Images)

WASHINGTON, DC - JUNE 18: Vice President J.D. Vance speaks during a news conference in the Brady Press Briefing Room at the White House on June 18, 2026 in Washington, DC. Vance is expected to travel to Lucerne, Switzerland tomorrow for follow up talks after a memorandum of understanding (MOU) to end the conflict between the United States and Iran was signed between U.S. President Donald Trump and Iranian President Masoud Pezeshkian. (Photo by Andrew Harnik/Getty Images)

WASHINGTON, DC - JUNE 18: Vice President J.D. Vance speaks during a news conference in the Brady Press Briefing Room at the White House on June 18, 2026 in Washington, DC. Vance is expected to travel to Lucerne, Switzerland tomorrow for follow up talks after a memorandum of understanding (MOU) to end the conflict between the United States and Iran was signed between U.S. President Donald Trump and Iranian President Masoud Pezeshkian. (Photo by Andrew Harnik/Getty Images)

US Vice President JD Vance arrives for during a press briefing in the Brady Briefing Room of the White House in Washington, DC, on June 18, 2026. (Photo by Ken Cedeno / AFP via Getty Images)

US Vice President JD Vance speaks during a press briefing in the Brady Briefing Room of the White House in Washington, DC, on June 18, 2026. (Photo by Ken Cedeno / AFP via Getty Images)

US Vice President JD Vance speaks during a press briefing in the Brady Briefing Room of the White House in Washington, DC, on June 18, 2026. (Photo by Ken Cedeno / AFP via Getty Images)

US Vice President JD Vance speaks during a press briefing in the Brady Briefing Room of the White House in Washington, DC, on June 18, 2026. (Photo by Ken Cedeno / AFP via Getty Images)