Melissa Harris-Perry said she was refusing to go on the MSNBC show she hosts this Saturday, following several weeks of pre-emptions and what she described as a loss of editorial control.

In an email sent to people she works with this week, which was obtained by The New York Times, Ms. Harris-Perry said that her show had effectively been taken away from her and that she felt “worthless” in the eyes of NBC News executives.

“Here is the reality: Our show was taken — without comment or discussion or notice — in the midst of an election season,” she wrote. “After four years of building an audience, developing a brand and developing trust with our viewers, we were effectively and utterly silenced.”

Saturday may well be the day that altered the course of the Democratic presidential race, when Hillary Clinton blunted Bernie Sanders’ campaign, when she was forced to work as hard as she ever has for a week (with a little help from a lot of friends) and slingshotted her with new momentum into South Carolina and then Super Tuesday. Nevada may indeed prove to be the day that saved Hillary Clinton’s campaign.

But the caucus, which Clinton won by about 5 percentage points, also cemented Prince Harry as a man Machiavelli would have bowed to, a man who with one eye who still sees the field better and is still more dangerous, effective and cunning as any pol the state (the country?) has ever seen. Clinton may not have won Nevada if Reid had not interceded last week when the man feigning neutrality saw what everyone in the Democratic elite saw: Sanders erasing a once mountainous lead and on the verge of perhaps winning Nevada and rendering inoperative the “Hillary is more electable” argument.

The story of the Nevada caucus is that a lame-duck senator and a self-neutered union conspired to revive the Clinton campaign in a remarkable bit of backroom maneuvering that helped Madame Secretary crush Sanders in Clark County, the key to winning almost any statewide election. Combined with a Clinton machine, erected last spring and looking invincible, that suddenly had to scrape the rust off its gears and turn out her voters, Caucus Day also was a remarkable story of an indomitable candidate, her nonpareil Nevada staff and a ragtag but committed Sanders operation that made them sweat.