President Trump has double down again on the idea of sending illegal immigrants to so-called "sanctuary cities", taking the idea from policy theory to, apparently, policy reality.

Deputy Press Secretary Hogan Gidley spoke with Fox News Channel's Jeanine Pirro on Saturday, and after he articulated the notion, Trump tweeted about it. Gidley indicated this an active plan that they are working on implementing right now.

"They are telling us you cannot keep family units who come here illegally and unlawfully at the southern border. You can't keep them at detention facilities. You can't deport them," said Gidley. "The only thing you can do is, as an administration is, release them into American communities."

"So, the president said listen, there are sanctuary cities out there where Democrats have said we welcome any and all whether they criminals, whether they are here illegally, seeking asylum, regardless. Anybody who disagrees with us is racist," he continued, putting the rationale into words. "So the president said fine, I've got a great idea. We'd love to work with you guys to figure out exactly the best way to transport these people were here illegally and unlawfully and into your communities and your districts and your states."

He added that no Democrats from those cities have come to the White House and said "We love to work with the administration, send everybody to our town."

Gidley added that the administration is actively reviewing what they can do lawfully, and looking into "any and all options."

"But the fact is we released them already into certain communities, what's the difference in releasing them a little further into Sanctuary Cities? Where they say they have set up communities by law that allow people into their states, into their towns, that have no right to be here," he said.

Pirro asked Gidley whether the policy of sending people to sanctuary cities has already begun, and he said that it has not, "not yet, we're trying to figure out if we can do that legally."

He also said they are working with DHS and ICE to make the policy a reality.