John Oliver Tears Into Trump's 'Maddeningly Vague' DACA Decision: 'Clearly Out of His F-cking Mind'

"He's all over the place," the "Last Week Tonight" host said during the Sunday segment (above). "Dreamers have to go, but maybe they can come back, or maybe they don't have to go at all, and in the meantime, 800,000 people's lives are in the balance."

When Trump was asked about his "mixed signals" regarding DACA on Sept. 6, he didn't express a solid game plan, but he did promise, "We're going to make a lot of happy people."

"Any time Trump says he's going to make people happy, or that you're going to be happy in the future, that means he has got nothing and is trying to end the conversation," Oliver said. "That's how he shot down Chuck Todd."

The comedian played a clip of then-presidential candidate Trump telling NBC's Chuck Todd back in 2015 that he's "going to keep the families together" after rescinding DACA.

Oliver then likened Trump's tone to that of "somebody who forgot to buy an anniversary gift and is stalling for time. 'Wait until you see what's up for you. I'm gonna be back in 45 minutes. You're gonna be so happy!'"

The DACA program, created by former President Barack Obama, was a temporary solution created to protect undocumented immigrants who came to the United States as children from being deported.

According to Oliver, Trump's decision to pull the plug on the program would allow the president to "both kill an Obama-era program and pick on hundreds of thousands of immigrants, which for Trump, is really killing two birds with one stone."

"Incidentally, his favorite childhood pastime," Oliver joked.

"It is actually really ironic that he is taking such a hard line against Dreamers," Oliver said. "Because this guy is clearly out of his f-cking mind."