The issue has become convoluted, with both sides delivering misleading versions of what is a complex system of polices and laws governing how the country treats illegal immigrants who arrive as adults, as families, and as juveniles traveling without their parents.
Bannon, who left the White House in August, said he didn't think Trump was "going to back off from" the separations. "I appreciate the need to enforce and protect our global boundaries, but this zero-tolerance policy is cruel", she wrote.
"Right now, we are in a circumstance where either we choose to enforce the law or we choose to ignore it", a DHS official said.
"We're studying the proposal", said Arizona Rep. Martha McSally, who is viewed as the GOP establishment's favorite in one of the top Senate races. Now the agency also has to shelter the ones the government has separated from their families. Republican Senator Susan Collins of ME said Sunday the number "may well be higher".
"Our policies are discouraging people from making children endure that treacherous journey", Sessions said. Rev. Franklin Graham, who's typically a Trump ally, told Christian Broadcasting Network that it's "disgraceful, it's awful, to see families ripped apart, and I don't support that one bit".
She hoped lawmakers from both parties can agree on immigration reform, in what was a rare public statement on a policy issue from the president's wife.
"This must not be who we are as a nation", said Representative Jerrold Nadler, one of seven members of Congress from NY and New Jersey who met with five detainees inside the facility, including three who said they had young relatives removed from their care after seeking asylum at the border.
Sessions has repeatedly touted the policy and it's necessity in appearance around the country and in interviews. Some mothers say they were told their children were being taken for a bath, but were never returned.
Appearing on "This Week with George Stephanopoulos", Bannon told guest host Jonathan Karl that it is time for Trump to play hardball. The plan includes US$25 billion for a wall along the US-Mexico border.
And on Sunday morning he retweeted a tweet from Saturday blaming Democrats for breaking up families.
'Democrats can fix their forced family breakup at the Border by working with Republicans on new legislation, for a change! Democrats are good at only three things, High Taxes, High Crime and Obstruction. Sad!
"If the Democrats are serious, and if a lot of Republicans are serious, they'll come together", she said.
"The secretary of homeland security said that if parents present at a legal port of entry with their children, with the claim of asylum, that their children would not be taken away - yet there are numerous credible media accounts showing that is exactly what is happening", Collins said on "Face the Nation", adding, "The administration needs to put an end to that, right off".
"These children are thrust into detention centers often without an advocate or an attorney and possibly even without the presence of any adult who can speak their language".