What a small and politically vicious man New York's new mayor is. Bill de Blasio doesn't like charter schools. They are too successful to be tolerated. Last week he announced he will drop the ax on three planned Success Academy schools. (You know Success Academy: It was chronicled in the film "Waiting for Superman." It's one of the charter schools the disadvantaged kids are desperate to get into.) Mr. de Blasio has also cut and redirected the entire allotment for charter facility funding from the city's capital budget. An official associated with a small, independent charter school in the South Bronx told me the decision will siphon money from his school's operations. He summed up his feelings with two words: "It's dispiriting."

Some 70,000 of the city's one million students, most black or Hispanic, attend charter schools, mostly in poorer neighborhoods. Charter schools are privately run but largely publicly financed. Their teachers are not unionized. Their students usually outscore their counterparts at conventional public schools on state tests. Success Academy does particularly well. Last year 82% of its students passed citywide math exams. Citywide the figure was 30%.

These are schools that work. They are something to be proud of and encourage.

Mr. de Blasio's move has caused considerable personal anxiety and widespread public anger. The Daily News on Thursday called the nearly 200 Success Academy students who now have no place to go the mayor's "educational orphans." A reporter spoke to distraught families. "I wanted the best for my daughter," said Rakim Smith, 40, a cable technician from Harlem whose daughter Dymond is a sixth-grader at Success Academy Harlem Central Middle School. "Now they're trying to take it away." "I don't know where else I can send my son so that he can have the same level education," said Fatoumata Kebe of the Bronx, whose 11-year-old son, Ousmane, goes to Harlem Central.

On Thursday Mr. de Blasio went on a sympathetic radio station and couldn't have been clearer about what is driving his actions. Charter schools may help the poor and those just starting out in America, they may give options to kids who've floundered elsewhere, but a lot of them are supported by rich people. There is a "strong private-sector element" in their funding, he said. The mayor agreed with host Ebro Darden that "a lot" of charter schools are funded by big business: "Oh yeah, a lot of them are funded by very wealthy Wall Street folks and others." When Mr. Darden and co-host Peter Rosenberg suggested that a "campaign" to portray the mayor as anti-charter-school was also funded by big business, Mr. de Blasio, as the New York Post noted, didn't disagree. "I think you're providing a keen political analysis there."