"I'm ashamed that we're doing this" said one child expert.
The agents detained the jogger and sent her to the DHS-operated Tacoma Northwest Detention Center more than 124 miles away
Representative Dr. Roger Marshall said there was another side to the story and defended the now-abandoned practice.
The group also protested President Donald Trump's now-abandoned practice and the president himself.
"No more baby interment camps, just regular internment camps. That's what we call a win in 2018."
The president's comments came hours after he signed an executive order on family separation at the border.
Nielsen should not be allowed to eat in peace, the protest group said.
The first lady appeared to follow her step-daughter's lead, not realizing how the message sounded.
His comments come amid a backlash against the administration's policy.
The White House counselor argued with CNN's Chris Cuomo over the controversial policy.
The recording was released amid a backlash over Trump's border policy.
The tweet referenced a quote from conservative pundit Ann Coulter, who said the president should be wary of child actors.
The senator appears to have felt far less passionately about the issue in a letter to voters.
Michael Hayden shared a picture of Auschwitz alongside a comment about children being separated from their parents.
Legend's tweet comes following criticism of Ivanka Trump for sharing a similar message.
The United Nations Human Rights Office asked U.S. authorities to "immediately halt" the practice of separating immigrant children from their parents on the southern U.S.-Mexico border Tuesday morning.