Trump arrived in Riyadh on Saturday morning as the first leg of his first foreign visits since his election as US President.
Trump announced the break-up of the advisory councils after 3M Co's Inge Thulin became the latest of several chief executives to leave Trump's American Manufacturing Council, and the president's Strategic and Policy Forum broke up of its own will.
Tsien said the carmaker will introduce its technology into China, albeit without a timetable, as both GM and China are passionate about the technology.
Trump tweeted: "Space Force all the way!"
Trump announced cancellation of the meeting in a letter to Kim Jong-un last week, citing "tremendous anger and open hostility" displayed by Pyongyang recently.
Trump has said privately over the past weeks that he is not interested in getting into another foreign conflict. But two of his senior advisers — Secretary of State Mike Pompeo and national security adviser John Bolton — are especially hawkish on Iran and have used tougher language.
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Trump unveiled a plan to help states ramp up widespread testing for the coronavirus. He said the US has done 5.4 million tests for the coronavirus, which he said was "double" what any other country in the world has done.
Trump has pursued a series of legal challenges in numerous states, although none has thus far resulted in any meaningful gains for the president. Most of the lawsuits have been rejected by judges, who have expressed skepticism about the claim that the election results are illegitimate.
Trump had said that "torture works" and that he would consider using it again.
Trump's family has also been fair game for Democrats. They have criticized Trump for the roles his children and son-in-law play in government and in policy negotiations, as well as the financial benefit his family business has seen since his presidency began.