"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.

Senior Biden administration officials said the leaders would announce plans to expand an Indo-Pacific Partnership for Maritime Domain Awareness.

"A new Quad maritime security initiative would send a very strong signal to China, that its maritime bullying is unacceptable, and that it would be met with coordinated action by

President Biden met Saturday with the leaders of India, Australia and Japan, which make up a cooperative partnership in the Indo-Pacific, as the U.S. looks to strengthen ties in the region and counter a growing threat from China.