President Joe Biden on Saturday is hosting a fourth Quad Leaders Summit with Japanese, Australian and Indian leaders to discuss maritime security and announce a "cancer moonshot" initiative.

"It will survive way beyond November," Mr. Biden declared of the Quad as the leaders gathered at the Archmere Academy, his high school alma mater.

President Joe Biden is convening the leaders of Australia, India and Japan for a Quad summit in his hometown of Wilmington, Delaware, this weekend, aiming to put a final stamp on an alliance he hopes will endure beyond his presidency.