John Mulaney skewered U.S. Health Secretary Robert F. Kennedy Jr. over his third marriage to actor Cheryl Hines during a recent stand-up set at the Hollywood Bowl. Performing last week as part of the Netflix Is a Joke Festival , the comedian, 43, switched from his typical self-deprecating humor to take aim at RFK Jr. and Hines, who have been married since 2012 . Speaking to the sold-out crowd, Mulaney claimed he had met “Bobby” a decade ago, when they were both involved with Riverkeeper , an environmental organization dedicated to protecting New York’s Hudson River. “That’s how much he shouldn’t be in the government — I know him,” the comedian quipped, according to Entertainment Weekly . After mimicking the politician’s gravely voice , he delivered the brutal punch line: “He’s comedy adjacent, you know. He’s married to that woman from Curb Your Enthusiasm and cheats on her like a dog.” His joke reportedly left the audience silent, except for a few audible gasps.…