Morning Joe’s Mika Brzezinski launched a blistering attack on Homeland Security Sec. Kirstjen Nielsen after her testimony before the House Homeland Security Committee.

Brzezinski, who co-hosts the left-leaning MSNBC morning show, accused Nielsen of overseeing a "shameful" situation and of becoming "the face of the Trump administration’s abuse of children at the border."

“When she says they don’t use cages, look at these pictures. She’s defying the obvious in the most Trump-like way,” Brzezinski said.

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Kirstjen Nielsen came under fire from Morning Joe’s Mika Brzezinski (right) on Thursday morning after her testimony Wednesday before the House Homeland Security Committee.

Kirstjen Nielsen came under fire from Morning Joe’s Mika Brzezinski (right) on Thursday morning after her testimony Wednesday before the House Homeland Security Committee. (Getty)

“The situation is shameful, and it just seems like she lacks the ability to care about the border crisis in a real way…I’m just praying public pressure will force her to change course, maybe have her do her best and save these children from further heartbreak and suffering because that is what’s happening and that’s not who we are.”

The host added: “She’s become the face of the Trump administration’s abuse of children at the border.”

The attack came after Nielsen was caught in a series of heated exchanges with House lawmakers Wednesday while being questioned over family separations at the border, with one Democrat accusing her of having “no feeling, no compassion.”

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She was pressed by members of the Democratic majority over claims that the Trump administration went out of its way to separate families.

“I think it’s really important, Madam Secretary, that you talk about it and you use the right language. This was not the law, OK,” Rep. Kathleen Rice, D-N.Y., said Wednesday. “This was a policy that the attorney general of this country announced was a new policy that they were going to rip kids away from their parents. So I think it’s very important that the record reflect that.”

Nielsen then turned to the committee's chairman, Rep. Bennie Thompson, D-Miss., asking if she could respond before being interrupted that she should “do it in writing.”

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“The AG memo that was issued directed all U.S. attorneys offices along the southwest border to prosecute all adults who were referred for prosecution, that’s what it did,” Nielsen managed to say.

“That is a policy,” Rice said. “But not as you described it,” Nielsen replied.

Rice continued: “That is a policy. When you knew that that policy was going to result in children having to be taken away from their parents, that’s a policy. You should admit it.”

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Nielsen said any separations were a “consequence” of illegal activity and not the intent of the law.

“The consequence of any adult going to jail in this country is, they’re separated from their child, that wasn’t the point of it. The point was to increase prosecutions for those breaking the law and not exempt any class of aliens.”

Prior to the heated exchange between Rice and Nielsen, she was grilled by Rep. Nanette Barragán, D-Calif., over her initial handling of the separations, claiming Nielsen was either “lying” or unaware of “what’s happening at the border.”

"You said you waited to give direction on how to implement the zero-tolerance policy because you wanted to do it with compassion," she said. "Do you know how outrageous that sounds?"

Barragán fired a line of questions at Nielsen.

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“Would you like me to answer any of your questions, because I would be happy to do so,” Nielsen said after repeated interruptions.

"You have no feeling, no compassion, no empathy here," Barragán finished.