Trump has threatened to withdraw from the organization throughout the pandemic. Despite wide criticism, he announced on Friday that the US would terminate its relationship with the WHO.
TuSimple, founded in 2015, currently operates self-driving trucks out of Tucson, Arizona. It is one of a number of start-ups developing technology aimed at making long-haul trucking cheaper and more efficient.
Trump, who is seeking another four-year term in the November 2020 presidential election, has called the impeachment drive an "attempted coup" by Democrats seeking to nullify his 2016 election victory. The Senate's top Republican, Mitch McConnell, has predicted there is "no chance" his chamber will remove Trump when it holds its trial.
Trump said on Thursday that Mexico and Canada, the two countries that are renegotiating with the US the North American Free Trade Agreement (NAFTA), will be exempted for now. He said the tariffs will still apply to the US' two North American neighbors "if we don't make the deal on NAFTA and if we terminate NAFTA because they are unable to make a deal that's fair".
Trump, holed up in the White House with Congress adjourned for the weekend, warned of a much lengthier impasse and blamed the Democrats.
Trump's remarks on Tuesday indicated he was walking back his remarks made at the Helsinki summit at which many in the US believed he was publicly siding with Putin in attacking the US intelligence community.
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Trump tweeted Friday morning, "If Mexico doesn't immediately stop ALL illegal immigration coming into the United States through our Southern Border, I will be CLOSING the Border, or large sections of the Border, next week."
Trump has repeatedly suggested Canada was profiting from US trade, and his blistering comments after the G7 meeting drove bilateral relations to their lowest point in decades.
Trump offered no details, and any plan will have to be debated in Congress.
Trump said he and Putin talked about the issue of adoptions between Russia and US.