U.S. President Donald Trump lost more than an election last week. When he leaves the White House in January, he will also lose the constitutional protection from prosecution afforded to a sitting president.

After Jan. 20, Trump, who has refused to concede and is fighting to hold onto his office, will be more vulnerable than ever to a pending grand jury investigation by the Manhattan district attorney into the president’s family business and its practices, as well as his taxes.

The two-year inquiry, the only known active criminal investigation of Trump, has been stalled since last fall, when the president sued to block a subpoena for his tax returns and other records, a bitter dispute that for the second time is before the U.S. Supreme Court. A ruling is expected soon.