This is the quintessential example of agenda setting. If you asked the same respondents and open ended question “What sort of aftermath do you expect for the election of 2020?” and let respondents offer up a response you would probably get 2-3% addressing violence. But if you ask it as “What level of violence do you expect after the 2020 election?” You have framed and compartmentalized the answer. Pretty elementary stuff, but there are no standards in the media anymore.