(CNA) Former White House Chief of Staff Reince Priebus stated that he believed the US's signing of the National Defense Authorization Act was a positive step and demonstrated the US's support for Taiwan. The bill includes a provision that would allow the US and Taiwanese navies to call at each others' ports. However, the bill greatly angered mainland China, which said that a US ship docking at a Taiwanese port would trigger a response from the PLA.