She didn't say she's scared of Trump. She just said she's scared that there might not be another election.
First of all, she's a comedian and she might be using facetious irony as part of her roast (i.e., poking fun at the crowd because of THEIR politics).
And, second, given what the Democrats, the DOJ, the Pentagon, the CIA, and the FBI might do to resist Trump, there's good reason to wonder if they might try to overthrow the government and establish a dictatorship.
(i.e., poking fun at the crowd because of THEIR politics).
that's why I laughed