CNN anchor John King admitted what many liberal critics of President Donald Trump refuse to acknowledge about controversial migrant child detention in a segment Tuesday.

"I just want to remind people, that under president Trump, Democrats don't like anything he says about immigration, he's had problems with his own party on immigration," King explained.

"But this particular issue is not new. I just want to go back, this is an interview, going back to 2014, with the then-Democratic president of the United States," he added.

"There are some Democrats who come to the table and say Trump created this crisis, this is all about Trump," King continued. "Alright, maybe it escalated under Trump, the numbers are certainly higher under Trump, but this has been a problem the United States government has had to figure out a solution to, for a very long time."

King then aired a recorded clip of then-President Barack Obama talking about the problem of unaccompanied migrant children.

"The problem is is that under current law, once those kids come across the border, there's a system in which we're supposed to process them, take care of them until we can send them back," Obama said in the clip.

"Oh, our message absolutely is don't send your children unaccompanied on trains," he said, "or through a bunch of smugglers, that is our direct message to families in Central America, do not send your children to the borders. If they do make it, they'll get sent back..."

"That is five years ago this week, that's five years ago this very week," King repeated for emphasis.

"In the sense that again, there's a current divide, the current president evokes emotions among Democrats," King continued.

"A lot of progressive weren't too happy with that president, President Obama, they called him the deporter-in-chief," he added.

"But this issue has been unresolved, different pieces of it, for 25 plus years," King concluded. "About unaccompanied children, that's a clip from five years ago this week."

Here's the video of King's admission on CNN: