Article continues below advertisementConan O'Brien is signaling a tonal shift ahead of Hollywood's biggest night.The veteran comedian, who will host the 98th Academy Awards on March 15, has suggested viewers shouldn't expect a steady stream of jokes about President Donald Trump this time around - a notable change after a year filled with pointed political punchlines."I think he's bad for comedy," O'Brien said of Trump during a recent appearance on "The New Yorker Radio Hour" podcast. "There are comedians who, when they talk about Trump, quickly get very angry.