WASHINGTON—The federal judge who stopped the Trump administration’s download ban on video-sharing app TikTok determined that the government likely overstepped its authority under national security law, according to his decision made public Monday.
Judge Carl Nichols of the U.S. District Court in Washington, D.C., granted a preliminary injunction against the ban late Sunday. In his 18-page ruling released Monday, the judge said the 1970s International Emergency Economic Powers Act—which President Trump invoked to pursue the…
