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MSNBC’s “Morning Joe” co-host Mika Brzezinski is still fired up about President Trump’s tweet mocking Sen. Kirsten Gillibrand and took her frustrations out on first lady Melania Trump and first daughter Ivanka Trump.

“[Trump] should have apologized for being a sexist pig,” Brzezinski said. “And the women around him, his wife, who has a platform against cyber bullying, that’s a joke. That’s the saddest thing I’ve ever seen.”

Brzezinski then shifted her attention to Ivanka Trump, “Who came to Washington… to develop a platform for women,” but has stood by her father.

“Go home. You’re doing nothing if you stand by this president,” Brzezinski said of the first daughter.

Brzezinski began her attack on the women around Trump on Tuesday, when she responded to Trump’s attack on Gillibrand by telling female staffers they’re “worth nothing” unless Trump deletes his tweet.

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MSNBC’s “Morning Joe” co-host Mika Brzezinski is still fired up about President Trump’s tweet mocking Sen. Kirsten Gillibrand and took her frustrations out on First Lady Melania Trump. (REUTERS)

Trump tweeted early Tuesday: “Lightweight Senator Kirsten Gillibrand, a total flunky for Chuck Schumer and someone who would come to my office “begging” for campaign contributions not so long ago (and would do anything for them), is now in the ring fighting against Trump. Very disloyal to Bill & Crooked-USED!”

Many, including the MSNBC morning show co-host, saw the message as a sexual double entendre.

"Go home [Ivanka]. You’re doing nothing if you stand by this president"

— Mika Brzezinski

“Sarah Huckabee Sanders, good luck today in the briefing. Don’t lie. And do not defend the President of the United States for what he did. If you do… you should resign,” Brzezinski said when reacting to the tweet on live TV. “But everybody else, working around the president, if your day is not consumed by getting him to take down that tweet, please leave. You are worth nothing.”

Hours later, when Sanders took the podium for a White house press briefing, she ignored Brzezinski’s request and said only people with their “mind in the gutter” would have interpreted the tweet as sexist.

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(Brzezinski shifted her attention to Ivanka Trump, “Who came to Washington… to develop a platform for women,” but has stood by her father.)

“He's talking about way the system functions as it is -- politicians beg for money, that's not something new” she said. “No way this is sexist at all.”

Brzezinski said, “I don’t know how she does that,” after the clip was aired on “Morning Joe” on Wednesday.

The MSNBC star also started a Twitter hashtag to express support for Sarah Sanders, who Brzezinski is urging to turn on her boss.

“Tell her it’s OK to step up and say the truth about the president's tweet,” Brzezinski wrote. “Retweet to show your [sic] support women and truth!”