"Here is this island of 23 million people trying hard every day to protect ourselves and protect our democracy and making sure that our people have the kind of freedom they deserve," she said.
"If we fail, then that means people that believe in these values would doubt whether these are values that they (should) be fighting for."
Taiwan and mainland China have been separately governed since the Nationalists retreated to Taiwan at the end of the Chinese civil war more than 70 years ago. Taiwan is now a flourishing democracy but the mainland's ruling Chinese Communist Party (CCP) continues to view the island as an inseparable part of its territory -- despite having never controlled it.