Lieberman apologized to his colleagues in an email Tuesday, calling his tweet “racist and sexist” and saying he was “deeply ashamed." A Columbia spokesperson shared the email with NBC News. “An apology from me to the Black community, to women, and to all of you is not enough,” the email said. “I’ve hurt many, and I am beginning to understand the work ahead to make needed personal changes and over time regain your trust.”

I'm glad he got fired. I hope he ropes himself in penance.