Jimmy Kimmel’s 7-month-old son suffers from a congenital heart condition called tetralogy of Fallot with pulmonary atresia, and he underwent open heart surgery at 3 days old.

Since the whole ordeal, Jimmy has used his show as a talking point on health care. And recently, he brought out Billy for another plea to politicians.

“Daddy cries on TV but Billy doesn’t,” Kimmel laughed as he held back tears. “It’s unbelievable.”

Jimmy and Billy are standing up for the Children’s Health Insurance Program (CHIP): “It covers around nine million American kids whose parents make too much money to qualify for Medicaid, but don’t have access to affordable coverage through their jobs, which means it almost certainly covers children you know… About one in eight children are covered only by CHIP.”

“It’s on the back burner while they work out the new tax plans, which means parents of children with cancer and diabetes and heart problems are about to get letters saying their coverage could be cut off next month. Merry Christmas, right?” Kimmel said. “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 urged people to call (202) 225-3121 and speak to representatives in the House and Senate to rectify this situation.