
The boiling mind of Trump has spawned a cottage industry for cognitive experts who have questioned whether he is, well, all there. But as the impeachment inquiry barrels ahead on Capitol Hill, several associates of the president, including former White House aides, worry that his behavior is likely to get worse. Angered by the proceedings, unencumbered by aides willing to question his judgment, and more and more isolated in the West Wing, Trump is apt to lash out more at enemies imagined and real…