Taiwan President Tsai Ing-wen met senior US Republican lawmakers during her stopover in Houston on Sunday en route to Central America, where she will visit Honduras, Nicaragua, Guatemala and El Salvador. Tsai will stop in San Francisco on 13 January, her way back to Taiwan.
China had asked the United States not to allow Tsai to enter or have formal government meetings under the one China policy.
Beijing considers self-governing Taiwan a renegade province ineligible for state-to-state relations. The subject is a sensitive one for China.