Christina Ferguson, 32, was arrested in Amherst Junction, Wisconsin after interrupting what turned out to be a meeting of a local environmental organisation, Tomorrow River Conservation Club.
She has been charged with disorderly conduct after allegedly smearing peanut butter on several vehicles parked outside the venue of the meeting which she mistakenly thought was a Donald Trump rally.
According to the complaint, Ferguson entered the meeting last Monday, which was being held in Amherst Junction, holding a jar of peanut butter and yelling at the club members about how much she hated the presidential candidate.
As they went outside, one man saw Ferguson spreading peanut butter on a vehicle. He yelled at her, according to the complaint, and watched her walk into a nearby apartment complex. The man then called the Portage Coonty Sheriff's Office.
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When deputies attempted to question Ferguson, a man at the apartment claimed she had been home all night and could not have been involved in the incident. Ferguson also claimed she had not left the apartment that night.
When asked why she did it, Ferguson become "very emotional", according to the complaint, and talked about "how much she loved Hillary Clinton and hated Donald Trump."
She also said she had been "terrorised" by people who support Donald Trump.
"Peanut buttering is better than firebombing, and Trump plans on firebombing everybody in other countries," she said, according to the complaint.
After the deputy explained to her that she had actually interrupted the meeting of a nonprofit conservation organisation, and that it was not a political meeting, she apologised and said she was "just fed up about the entire election."