Sen. Elizabeth Warren (D-Mass.) called on former New York Mayor Michael Bloomberg to release women who worked at his company from nondisclosure agreements they signed after making sexual harassment and sex discrimination allegations. The challenge, issued at Wednesday nights Democratic presidential primary debate in Las Vegas, came as Warren hammered Bloomberg over the scores of allegations that have been made over the years.

The mayor has to stand on his record, and what we need to know is exactly what is lurking out there, Warren said. Mr. Mayor, are you willing to release all those women from these nondisclosure agreements so we can hear their side of the story?

Warren described Bloomberg as having muzzled women who signed nondisclosure agreements while working at his company. Bloomberg and Bloomberg LP have faced almost 40 lawsuits from 64 women in recent decades. In several heated exchanges, Bloomberg described his hiring practices as progressive on gender equality, but Warren was not satisfied.

I hope you heard what his defense was: Ive been nice to some women. That just doesnt cut it, Warren said.

Warren continued pressing Bloomberg as he attempted to minimize the allegations against him and his company. When Bloomberg said there were very few nondisclosure agreements, Warren interjected, asking, How many is that?