Conan O'Brien decries 'bullies' while receiving Kennedy Center's Mark Twain Prizebr br Conan O'Brien accepted the Mark Twain Prize for American Humor on Sunday, March 23, with a not-so-subtle broadside against US President Donald Trump, whose takeover of the Kennedy Center, which awarded the prize, has shaken the arts world.br br A host of comedians including David Letterman, Adam Sandler, Sarah Silverman and Stephen Colbert celebrated O'Brien for comic greatness while ribbing the Trump administration and putting a spotlight on the renowned arts facility that is now overseen by Trump allies.br br But it was O'Brien, the longtime late-night television host and comedy writer, who aimed his comments most directly at the Republican president without using his name.