Jimmy Kimmel, who recently used his opening monologue to talk about his newborn son’s open-heart surgery, took on critics that said he used the platform to get political.

"I made an emotional speech that was seen by millions, and as a result of my powerful words on that night, Republicans in Congress had second thoughts about repeal and replace" of the Affordable Care Act, he joked. "I saved health insurance in the United States of America!"

"What's that? I didn't save it? They voted against it anyway?" Kimmel said. The House approved the American Health Care Act last week.

Kimmel was back hosting ABC's "Jimmy Kimmel Live" Monday after a week's absence. He said his son, Billy, is recovering well from open-heart surgery for a birth defect and thanked well-wishers. Then he charged back into the fraught topic.

He dismissed those who labeled him an elitist -- as a youngster, his family bought powered milk because they couldn't afford fresh, he said -- and pretended to repent for his previous comments.

"I'd like to apologize for saying that children in America should have health care. It was insensitive, it was offensive, and I hope you can find it in your heart to forgive me," Kimmel said.

He took on former House Speaker Newt Gingrich, saying his claim that all children would receive the same surgery as Kimmel's son in an emergency fell short of addressing what follows.

"That's terrific if your baby's health problems are all solved during that one visit. The only problem is that never, ever happens. We've had a dozen doctor's appointments since our son had surgery," Kimmel said.

Kimmel brought on a current GOP lawmaker, U.S. Sen. Bill Cassidy of Louisiana, a physician, who had suggested that the Senate's upcoming health care legislation should have a "Jimmy Kimmel test" of covering pre-existing conditions but in a fiscally conservative way.

During a satellite interview with Cassidy, Kimmel asked about his position on issues including uninsured workers and protection of children under a revised health care bill.

The senator called on viewers to contact their representatives and urge support of final legislation that fulfills President Donald Trump's promise to lower premiums combined with coverage that passes the Kimmel standard.

Kimmel called for his namesake test to guarantee that no family be denied medical care, emergency or otherwise, because they can't afford it.

"You're on the right track," Cassidy said, but the country has to be able to pay for it.

"Don't give a huge tax cut to millionaires like me," Kimmel replied.

On last Monday's show, the host detailed how Billy's routine birth April 21 suddenly turned frightening when he was diagnosed with a hole in the wall separating the right and left sides of the heart and a blocked pulmonary valve, a condition known as tetralogy of Fallot with pulmonary atresia. He successfully underwent surgery, but will face more as he grows.

Using his son as an example, Kimmel called for health care for all and for pre-existing conditions to remain covered as provided by the Affordable Care Act passed under President Barack Obama.

"If your baby is going to die and it doesn't have to, it shouldn't matter how much money you make. ... Whether you're a Republican or a Democrat or something else, we all agree on that, right?" he said.

The video of Kimmel's tearful monologue went viral, drawing praised by some, including Obama, and harsh criticism from others.

The Associated Press contributed to this report