With Twitter as his Excalibur, the president takes on his doubters, powered by long spells of cable news and a dozen Diet Cokes. But if Mr. Trump has yet to bend the presidency to his will, he is at least wrestling it to a draw.
For other presidents, every day is a test of how to lead a country, not just a faction, balancing competing interests. For Mr. Trump, every day is an hour-by-hour battle for self-preservation. He still relitigates last year’s election, convinced that the investigation by Robert S. Mueller III, the special counsel, into Russia’s interference is a plot to delegitimize him. Color-coded maps highlighting the counties he won were hung on the White House walls.
Before taking office, Mr. Trump told top aides to think of each presidential day as an episode in a television show in which he vanquishes rivals. People close to him estimate that Mr. Trump spends at least four hours a day, and sometimes as much as twice that, in front of a television, sometimes with the volume muted, marinating in the no-holds-barred wars of cable news and eager to fire back.
...
The ammunition for his Twitter war is television. No one touches the remote control except Mr. Trump and the technical support staff — at least that’s the rule. During meetings, the 60-inch screen mounted in the dining room may be muted, but Mr. Trump keeps an eye on scrolling headlines. What he misses he checks out later on what he calls his “Super TiVo,” a state-of-the-art system that records cable news.