In a startling departure from its typically dogged defenses, Planned Parenthood admitted through clenched teeth this week what many have asserted for decades: that their founder Margaret Sanger was a racist eugenicist.

Planned Parenthood of Greater New York announced Tuesday that it will remove the name of Margaret Sanger from its Manhattan abortion clinic and will even lobby the city to scrub her name from a street sign near its Bleecker Street location.

‘The removal of Margaret Sanger’s name from our building is both a necessary and overdue step to reckon with our legacy and acknowledge Planned Parenthood’s contributions to historical reproductive...