There’s a wide gulf of differences between the incoming and outgoing Presidents. Leave it to famed author Stephen King succinctly illuminate the biggest one.

Stephan King took to Twitter to comment on President-elect Donald Trump. King pointed out that the biggest difference between Trump and President Obama is that Trump has no sense of humor.

King tweeted: “One remarkable difference between Obama and Trump: the latter seems to have absolutely no sense of humor. The clearest sign of a dull mind.”