He's so fickle

Trump himself, took his time in offering his support to [Sarah Sanders] a top aide who [was refused service at a restaurant and who] has become one of the most recognizable lightning rods over his policies and false claims. He waited 48 hours before writing a Twitter post criticizing the appearance of the [Red Hen] exterior, which he called “filthy” and indicative of a “dirty” establishment. He called Ms. Sanders a “fine person.”

[...]

Even as her vigorous defenses of the president’s misstatements and her own obfuscations during White House briefings have eroded her public credibility, her stock with Mr. Trump has begun to sink.

In recent days, Mr. Trump has asked people privately what they think of Ms. Sanders — an indication, they say, that the press-obsessed president has begun souring on her. He has also told her, before she heads out to the lectern in the briefing room, that he is “going to grade” her televised performances. (People who have heard Mr. Trump make the threat say it is in jest.)

  NYT

Uh-huh.

Ms. Sanders has been under a more watchful eye from her boss since the White House Correspondents’ Dinner on April 27, when she remained in her seat during a scathing roasting from a comedian who called her a liar. Mr. Trump has told people in the West Wing that he thought Ms. Sanders should have walked out, as another White House official, Mercedes Schlapp, chose to do in a showy display.

Perhaps he should have gone, himself.

And while the president is known to be fickle about his staff, he also shies away from confrontation and does not relish firing people.

Excuse me?

“Healthy debate on ideas and political philosophy is important, but the calls for harassment and push for any Trump supporter to avoid the public is unacceptable,” Ms. Sanders said at the beginning of her briefing on Monday.

Nobody called for that. People are calling for mild protests and shunning of Trump administration officials. That's a whole lot different than "any Trump supporter."

...but hey, do what you want...you will anyway.