Jimmy Kimmel son Billy

Jimmy Kimmel’s seven-month-old son Billy appeared on the show last night to talk about the federal CHIP health insurance program for children. (Photo: ScreenCap)

Jimmy Kimmel marked his return to late night with a special guest last night, his toddler son Billy. A week before he underwent heart surgery. Kimmel used the moment to call for renewal of CHIP, a children’s health insurance program.

The 50-year-old talk show host has been a leading advocate of Affordable Care Act (ACA), which has provided health insurance to more than 20 million people.

Donald Trump has been leading an effort by Republicans in Congress to gut the program.

Republicans have also taken aim at the Children’s Health Insurance Program, also known as CHIP. Funding expired for it earlier this year and has yet to be renewed by Congress.

The program is expected to run out of funds soon, leaving millions of children without life-saving health insurance. Jimmy explained:

“Parents of children with cancer, diabetes and heart problems are about to get letters saying their coverage could be cut off next month. Merry Christmas, right? “This is literally a life and death program for American kids. It’s always had bipartisan support, but this year, they let the money for it expire while they work on getting tax cuts for their millionaire and billionaire donors.”

Kimmel took off last week and turned his show over to a succession of guest hosts, Chris Pratt, Tracee Ellis Ross, Neil Patrick Harris and Melissa McCarthy.

Meanwhile, seven-month-old Billy underwent heart surgery, his second of three operations to correct a birth defect.

“I was out last week – because this guy had heart surgery. But look he’s fine everybody. He may have pooped but he’s fine,” Kimmel told the audience, shedding a tear.

“Daddy cries on TV but Billy doesn’t – it’s unbelievable,” he added.

Check out the moving moment below. Let us know your thoughts and be sure to follow IM on Twitter for the latest in late night television.