Sen. Elizabeth Warren (D-Mass.) is putting newly confirmed Attorney General Jeff Sessions and Republican senators who approved him on notice.

GOP lawmakers on Tuesday night invoked Rule 19, which forbids speaking ill of other senators, to silence Warren as she attempted to read a letter from Coretta Scott King criticizing Sessions.

“She was warned. She was given an explanation,” Senate Majority Leader Mitch McConnell (R-Ky.) said. “Nevertheless, she persisted.”

Less than 24 hours later, Warren fired off a blistering series of tweets noting that Sessions is no longer a senator ― and no longer protected by Rule 19.

She also had a warning for her GOP counterparts who confirmed him.

Here’s what she said Wednesday evening:

I’m deeply disappointed that the Senate voted to confirm Jeff Sessions as Attorney General tonight. — Elizabeth Warren (@SenWarren) February 9, 2017

Deeply disappointed that the Senate confirmed an AG whose record does not show he will faithfully & fairly enforce the law. — Elizabeth Warren (@SenWarren) February 9, 2017

Thanks to you, everyone now knows the concerns that Coretta Scott King had about Jeff Sessions. Concerns that millions of people still have. — Elizabeth Warren (@SenWarren) February 9, 2017

There’s no Rule 19 to silence me from talking about Jeff Sessions anymore. So let me say loudly & clearly: This is just the beginning. — Elizabeth Warren (@SenWarren) February 9, 2017

If Jeff Sessions turns a blind eye while @realDonaldTrump violates the Constitution or breaks the law, he'll hear from all of us. — Elizabeth Warren (@SenWarren) February 9, 2017

If Jeff Sessions makes even the tiniest attempt to bring his racism, sexism & bigotry into @TheJusticeDept, he'll hear from all of us. — Elizabeth Warren (@SenWarren) February 9, 2017

And you better believe every Senator who voted to put Jeff Sessions’s radical hatred into @TheJusticeDept will hear from all of us, too. — Elizabeth Warren (@SenWarren) February 9, 2017

Consider this MY warning: We won’t be silent. We will speak out. And we WILL persist. — Elizabeth Warren (@SenWarren) February 9, 2017

In an interview with The Huffington Post, Warren said she was stunned when McConnell rose to object to her reading King’s letter.

“The rule is that you’re not supposed to impugn a senator,” Warren said. “Okay, I took that to mean you’re not supposed to call somebody an idiot or a jerk and I thought, wait, I didn’t do anything like that. I am reading a statement of both fact, and the opinion ― the conclusion ― of a civil rights icon who was there. This letter helped a Republican-led Senate back in 1986 not to confirm Jeff Sessions.”

She said no Republican senators have spoken to her privately since the incident, but was glad that the letter is now being read by millions of people.

“I know a lot of people have read Coretta Scott King’s letter. I posted it on Facebook, I tweeted it out. I’m glad that’s the case,” she said. “Because that letter is important right now today for the Jeff Sessions, vote but it’s important in the future. It’s important for us to touch that part of history, when people stood up and said, it’s not a question of whether it’s popular, it’s that you fight back for what you believe in. That the only sin is remaining quiet.”