President Trump’s Justice Department could file suit to stop AT&T’s $85 billion acquisition of Time Warner as early as Wednesday, one media analyst said late Tuesday.

Rich Greenfield, of BTIG Research, said in a tweet, “We now believe AT&T and Time Warner have been informed by the Department of Justice that a lawsuit is imminent.” That lawsuit, Greenfield added, could “hit as early as tomorrow (Nov. 15).”

DOJ antitrust Chief Makan Delrahim is scheduled to speak Thursday in Washington, DC, at the American Bar Association’s fall conference.

A suit could come before Delrahim’s appearance, Greenfield said. The DOJ under President Obama on April 6, 2016, sued to stop Halliburton’s $34 billion acquisition of Baker Hughes two days before the then-antitrust chief Bill Baer was scheduled to speak at the spring ABA conference.

AT&T, led by CEO Randall Stephenson, is expected to challenge a suit in court — including seeking to gain access to any communication between the White House and the DOJ, sources close to AT&T said.