President Joe Biden is set to wrap up his final stop on his first visit to Asia with a summit that's aimed at countering Beijing's expanding influence, a day after saying the United States would be willing to defend Taiwan militarily if China attacks. Biden's statement is sure to loom over the day's meetings, as he's set to meet in-person with the leaders of Japan, India and Australia as part of a revitalized Quad Leaders' Summit in Tokyo, capping off his four-day visit to South Korea and Japan.