After the first US-North Korea summit in June 2018, US policies toward China with regard to trade started to become tougher Since then, US policies toward Taiwan have become more proactive with regard to security affairs. Now that direct talks have begun between the US and North Korea, the US no longer has to rely on Chinese help with regard to the North Korean problem, and as a result, the US no longer has to exercise as much restraint as before with regard to Taiwan.
Then, can we say that US policies toward Taiwan have changed in a fundamental manner? Judging from President Trump's actions and comments, it does not appear that he is deeply interested in—let alone has a deep understanding of—the Taiwan issue. On the other hand, the hawks toward China, who form the majority in the administration, have shown an intention to treat the Taiwan as a part of the pressure on China, even as the tension in the US-China relationship has continued to rise. China regards the Taiwan as highly important with regard to the US-China relationship, and the US used to exercise a certain degree of restraint regarding Taiwan, treating it as a sensitive issue; however, the current US administration is not treating it as such. As the US-China conflict has deepened with regard to trade and security, ironically, the priority afforded to the Taiwan has declined, and it is not receiving the attention that it deserves.
The background underlying these changes includes changes in the State Department, which is in the position to co-ordinate and manage the US government's policies, as a whole, toward China and Taiwan. As the institution responsible for US diplomacy, the State Department has tried to maintain coherent and balanced policies toward China and Taiwan by sometimes overriding the hardline Department of Defense and the National Security Council, but it no longer sufficiently fulfills such a function. Susan Thornton, former acting Assistant Secretary of State, a well-known traditional China hand, was in charge of policies toward China for a long time in the State Department; she retired after the advent of the Trump administration because of the delay in obtaining congressional confirmation due to the criticism that she was “pro-China.” Many China experts who remained after Thornton's departure have also left, and on the practical level, there has been change in the continuity of policies toward China and Taiwan. As a result, the conventional approach of the State Department—that is, cautious management of the Taiwan issue by the US government as a whole—through coordination with other departments and agencies, is changing to one that involves a gradual upgrading of the US-Taiwan relationship.
Conversely, regarding security policies, the Department of Defense and the National Security Council, individually and based on their own perspectives, have been trying to be proactive in their dealings with Taiwan as part of their hardline policies toward China. The current administration had defined China as a revisionist power and stated its intention to resist it. Consequently, Taiwan is defined as an important strategic asset in the US countermeasures toward the increasingly active and expansive maritime activities of China, even as its military might continues to grow. It is clear that the US wants to co-opt Taiwan as part of its “Indo-Pacific strategies.”
In addition, as Taiwan's Kuomintang has become increasingly pro-China in recent years, the US government appears to be strengthening its support for the current Taiwanese government, the Democratic Progressive Party (DPP), which wants to keep its distance from China in view of the looming January 2020 Taiwanese presidential elections[6]. In the background to this, we find the DPP's lobbying activities in the US. While the activities of the Kuomintang are said to be weakening, the DPP maintains its own office in Washington, DC, the US capital, and is actively working on the US government, apart from the Taipei Economic and Cultural Representative Office (the Taiwanese government's office)[7].
As seen above, while the current US administration appears to be upgrading the US-Taiwan relationship, we can still see the exercise of a degree of restraint in its relationship with China. During the June 2018 completion ceremony for the new office of the American Institute in Taiwan (AIT), the de facto US embassy in Taiwan, it was speculated that John Bolton, the then National Security Advisor, would attend it; it was, in fact, attended by Marie Royce, the Assistant Secretary of State for Educational and Cultural Affairs[8]. During President Tsai Ing-wen's stay in New York and Denver in July 2019, which attracted much attention, there was no confirmed contact with high-level US government officials.