President Joe Biden walks to a group photo with from left, India's Prime Minister Narendra Modi, Australia's Prime Minister Anthony Albanese, Biden, and Japan's Prime Minister Fumio Kishida, at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden, joined by Australia's Prime Minister Anthony Albanese, Japan's Prime Minister Fumio Kishida, and India's Prime Minister Narendra Modi, stand for a group photo before speaking about a Quadrilateral Cancer Moonshot initiative on the sidelines of the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden greets India's Prime Minister Narendra Modi at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden meets with from left, Australia's Prime Minister Anthony Albanese, India's Prime Minister Narendra Modi, Secretary of State Antony Blinken and Japan's Prime Minister Fumio Kishida, at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden greets from left, Australia's Prime Minister Anthony Albanese, India's Prime Minister Narendra Modi and Japan's Prime Minister Fumio Kishida, at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden, India's Prime Minister Narendra Modi, Australia's Prime Minister Anthony Albanese, Japan's Prime Minister Fumio Kishida and Secretary of State Antony Blinken, meets at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden, joined by Australia's Prime Minister Anthony Albanese, Japan's Prime Minister Fumio Kishida, and India's Prime Minister Narendra Modi, walk out to speak about a Quadrilateral Cancer Moonshot initiative on the sidelines of the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden greets Japan's Prime Minister Fumio Kishida at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden, joined by Australia's Prime Minister Anthony Albanese, Japan's Prime Minister Fumio Kishida, and India's Prime Minister Narendra Modi speaks about a Quadrilateral Cancer Moonshot initiative on the sidelines of the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden greets Japan's Prime Minister Fumio Kishida at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden meets with India's Prime Minister Narendra Modi, Australia's Prime Minister Anthony Albanese, Japan's Prime Minister Fumio Kishida and Secretary of State Antony Blinken, at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden greets India's Prime Minister Narendra Modi at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden meets with India's Prime Minister Narendra Modi, Australia's Prime Minister Anthony Albanese, Japan's Prime Minister Fumio Kishida and Secretary of State Antony Blinken, at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden greets India's Prime Minister Narendra Modi at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden greets Australia's Prime Minister Anthony Albanese at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden, India's Prime Minister Narendra Modi, Australia's Prime Minister Anthony Albanese, Japan's Prime Minister Fumio Kishida and Secretary of State Antony Blinken, meet at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)

President Joe Biden, India's Prime Minister Narendra Modi, Australia's Prime Minister Anthony Albanese, Japan's Prime Minister Fumio Kishida and Secretary of State Antony Blinken, meets at the Quad leaders summit at Archmere Academy in Claymont, Del., Saturday, Sept. 21, 2024. (AP Photo/Mark Schiefelbein)