Another US congressional delegation is visiting Taiwan as tensions with China remain high over its claims to the self-governing island.
A number of American visitors have gone to meet with Taiwanese officials since US House Speaker Nancy Pelosi visited in early August.
China has responded by increasing its "military provocations", sending warships, warplanes and even drones towards the island every day.
Led by Florida Democrat Stephanie Murphy, the delegation met Thursday morning with Taiwanese President Tsai Ing-wen, whose administration China has repeatedly tried to strip of diplomatic recognition and participation in international organizations.
Referring to China's military threats, Tsai said the delegation's visit "conveys solid support for Taiwan from the US Congress."
"Taiwan will not bow to pressure or coercion," Tsai stressed.
"We will defend our democratic institutions and way of life.
"Taiwan will not back down."
Murphy responded that Congress "should advocate for greater Taiwanese participation in international organizations."
"Taiwan has shown itself to be a responsible member of the international community, especially in public health matters, and deserves to participate in international forums when appropriate," she said.
Murphy is among the lawmakers who introduced a bill that would allow the US to lend weapons to support Taiwan, similar to a bill it passed to give weapons to Ukraine.
Last week, the Joe Biden administration approved a $1 billion arms sale to Taiwan.