Trump is due to arrive on Thursday afternoon, straight from the NATO summit.
Trump, who publicly opposed taking away Gallagher's Trident pin, had intervened in the case to restore his rank. He cheered the moves.
Trump told reporters that he would probably hold the first of the new series of briefings on Tuesday at 5 pm EDT.
Trump also has suggested that parties to the potential sale should pay a fee to the US government for facilitating the deal. In the lawsuit, TikTok said, "The President's demands for payments have no relationship to any conceivable national security concern."
Trump has agreed to activate the National Guard in three states --California, New York and Washington -- which are hit the hardest by the spread of COVID-19. California National Guard is being deployed at the request of Newsom to assist food banks due to the shortage of volunteers.
Trump often openly attacks media outlets that cover the administration and has called The Post and other news outlets "fake news."
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Trump's controversial first official trip to Britain took place in last July, amid a backdrop of angry protests.
Trump tweeted after the announcement: "Wow! Big VICTORY on the Wall. The United States Supreme Court overturns lower court injunction, allows Southern Border Wall to proceed. Big WIN for Border Security and the Rule of Law!"
Trump and first lady Melania Trump planned to observe a moment of silence at the White House in remembrance of the nearly 3,000 people who were killed when hijackers flew commercial airplanes into New York's World Trade Center, the Pentagon and a field near Shanksville, Pennsylvania, the White House said.
Trump said during a North Atlantic Treaty Organization (NATO) meeting in London Tuesday that the United States has "the most powerful military" and "hopefully, we don't' have to use it" as well as "If we have to, we'll do it," in an apparent reference to the DPRK.