"It was orderly, but it was far from what I would call humane", he said.
Democratic lawmakers vowed on Sunday to end the "evil" separation of migrant children from their parents at the United States border, as First Lady Melania Trump made a rare political plea to end the controversial practice.
Despite that, presidential adviser Kellyanne Conway has rejected suggestions Mr Trump is using the children as leverage to force his opponents to enter negotiations on immigration and his long-promised border wall. Laura Bush said the ongoing policy at the border "breaks her heart" in an editorial published by The Washington Post.
Protesters outside the facility demanded authorities stop separating migrant children from their parents.
She said it was "eerily reminiscent of the Japanese American internment camps of World War II", which she said are "now considered to have been one of the most shameful episodes in USA history".
O'Rourke added he would join a march to Tornillo, Texas, where Democratic lawmakers plan to visit immigration centers and would also introduce a measure to end family separation. Normally, the two of them avoid getting involved into political debates, but the open criticism on the immigration policies from the two ladies has shown their concern for the children, who are getting traumatized at the border.
First Lady Melania Trump uncharacteristically shared her own opinion about the separation of migrant families at the U.S. -Mexico border on Sunday. She said that, "Democrats and Republicans need to find a way to get together and end this".
The House proposals face broad opposition from Democrats, and even if a bill does pass, the closely divided Senate seems unlikely to go along. Not one! Democrats are doing everything that they can in their power to end this separation of families at the USA borders, but Republicans are not willing to do it.
He will meet with Republican colleagues on Tuesday to discuss both bills, which the White House has said he would be willing to sign. So much so that she felt the need to speak out on the subject to one of the premier news outlets in the country.