Jimmy Kimmel was absent from his ABC late-night show last week while his 8-month-old son, Billy, recovered from his second heart surgery. Ever since Billy was born with a heart defect and required immediate surgery, Kimmel has become an outspoken advocate for universal health care, occasionally using his monologue to plead with (or deliver scathing criticisms of) members of Congress. “No parent should ever have to decide if they can afford to save their child’s life,” he said tearfully in May.